This is the 4th installment of the Getting Startedseries. Sanjay has co-authored a book on SG Procedures with SAS/PRESS. The following statements define and plot the data. As you point out, LEGENDITEM is new. I used ATTRPRIORITY=COLOR in the ODS GRAPHICS statement to avoid usage of line patterns in this graph. Also, remove the BLUE color from the LINEATTRS on the SERIES statement. charts sas time-series Share Follow edited Jul 24, 2017 at 20:43 asked Jul 24, 2017 at 19:45 Jarom 1,067 1 14 35 proc sgplot data =sashelp.iris; vbox SepalLength / category=Species; run; xaxis display=(nolabel); 1. Rick is author of the books Statistical Programming with SAS/IML Software and Simulating Data with SAS. Finally, I use the. Obviously, you can modify a lot more than this, but the above code serves as a nice template for a box plot in SAS. The STYLEATTRS statement can be used to set attributes or a DATTRMAP set can be used to associate specific Group values with a consistent set of line, marker and text attributes. A situation where this comes up is when you want to overlay a group of curves on a scatter plot. You can use the conversion rate between yen and dollars to align the values on the axes. You can turn off CYCLEATTRS if you do not want such automatic attribute assignment. To plot the data, define one variable for each unit. We can customize graphics adding features such as color, pattern, and size, within each plot statement. I added curve labels, which often make it easier to decode the information in the graph as the variable name is placed close to the curve, and one does not have to refer to the legend to decode the data. Furthermore, I specify Species as the categorical variable in the category= option. series x=date y=Drug_B / smoothconnect lineattrs=(thickness=3); Boxplot Petal Length by Species proc sgplot data=iris; vbox p_length / category=species; run; quit; Boxplot Petal Length by Species vboxbycat.png Barplots WithHILINE/VLINE(butcanbeusedwithout) proc Search: Sas Gplot Legend Statement. The purpose of the graph is to focus on one or two subgroups. The statements in PROC SGPLOT include many options that enable you to change the attributes for parts of the plot. You might use annotation or some other method to put something additional in a graph, and the default legend does not quite convey what you want. The two groups of people need to be next to each other so that their SE do not overlap and I need a line connecting each point for both groups. proc sgplot data=seriesMultiVar subpixel; This example adds a curve label to identify gender. We use the VBOX Statement in PROC SGPLOT and specify SepalLength as the analysis variable. See an example below. The markers for the two variables align exactly. Examples of Graphs that Can Be Generated by the SGPLOT Procedure; The following code creates an ellipse plot: proc sgplot data=sashelp.class; scatter x=height y=weight; ellipse x=height y=weight; run; The following code creates a horizontal box plot: proc sgplot data=sashelp.cars; hbox weight / category=origin; run; and the other axis to display the data in metric units (kilograms, liters, degrees Celsius, etc.). The POSITION= option contains the substring 'SIT'. This can be caused by multiple statements or by using the GROUP= option on a statement. Consolidate one or more items by using the LEGENDITEM statement (requires SAS 9.4M5). Yes, I didn't want the example to look too complicated, but you can automate this process by using PROC SQL to read the tick marks into a macro variable. I added arrowheads. This will enable both axes to use "nice numbers" while still aligning the data. The following statements use the SGPLOT procedure to plot CPI in the USCPI data set against DATE. This is a simple vertical box plot. Finally, the SAS procedure draws the outliers as a small dot. title 'Response by Date'; Because the axes display different ranges, the markers do not overlap. (Also, "position" can be used as a verb to mean "place on a page.") The SGPLOT procedure displays each variable by using a range of round numbers (multiples of 10 or 20). If the information in the default legend is redundant, and you might want to suppress it. I know my code has to look something like what I listed below. Now, we can use the GROUP option of the series plot to display this data using one SERIES statement. The xaxis is the year 1975-2019, but formatted (using proc format) so that it shows the value of year as '75-'19. Since the x-axis uses a numeric variable with a SAS date format, the x-axis only displays the "year" when necessary. specifies the maximum line thickness when a response variable is used to determine the line thickness. The Y and Y2 axes are independently scaled because PROC SGPLOT does not know that pounds and kilograms are linearly related. As for controlling the group colors, you have two options. To get a plot of all three columns, we simply add as many SERIES plot statements as we need. The graph on the right also increases the thickness of the connect line using the LINEATTRS=(THICKNES=3) option. run; In the graph above, I have made the following changes: Finally, the SERIES plot statement has support for multiple grouping for color and patterns. The procedure PROC SGPLOT in Base SAS is a powerful procedure to create various graphics. Featured in: Plotting Three Series Syntax SERIES X= variable Y= variable < / option (s)>; option (s) can be one or more options from the following categories: SERIES options: Plot options: Required Arguments X= variable specifies the variable for the x axis. When you use the GROUP= option to display groups, you might want to exclude some of the group categories from the legend. Because the axes display different ranges, the markers do not overlap. Notice that the Y axis (pounds) no longer displays "nice numbers" because I put the tick marks at the same vertical heights on both axes. Therefore, the valid keywords for the LOCATION= option are INSIDE and OUTSIDE. (The USCPI data set was shown in a previous example; the data set plotted in the following example contains more observations than shown previously.) title "Boxplot Of Sepal Lengths"; proc sgplot data=sashelp.iris noautolegend; vbox SepalLength / category=Species connect=mean connectattrs=(color=black pattern=mediumdash thickness=1) meanattrs=(symbol=plus color=red size=20) lineattrs=(color=black) medianattrs=(color=black) whiskerattrs=(color=black) outlierattrs=(color=green symbol=starfilled size=12); xaxis display=(noline noticks nolabel); yaxis display=(noline noticks) labelattrs=(weight=bold); run; title; You can see the modified plot to the right. First of all, I use the connect=mean to connect the means of the plot with straight lines. However, sometimes it is useful to override the procedure's default choices. However, the range for the Y axis is approximately [50, 150] pounds. In fact, this one procedure produces 15 types of graphs. Y= variable specifies the variable for the y axis. A CAT likes to go INSIDE and OUTSIDE the house. . This is what I have to simply make the chart: proc sgplot data=work.summary; series x=year y=sale_amt / group=brand; run; Thank you. You can click on the graph to get a higher resolution image. However, I can never remember which option controls which attribute! In this new graph, the measurements are displayed on compatible scales and the reference lines connect round numbers on one axis to the corresponding values on the other axis. The SGPLOT code for this graph is shown below. Therefore follows quite a few attrs options, which edit the connection lines, median lines and so on. This provides an alternate clean appearance for the graph. A 1 2 Exclude one or more items from a legend by using the EXCLUDE= option on the KEYLEGEND statement (requires SAS 9.4M3). THICKMAX= dimension. Save my name, email, and website in this browser for the next time I comment. The subsequent call to PROC SGPLOT plots the pounds on the Y axis (left axis) and the kilograms on the Y2 axis (right axis). The simplest situation is a single set of data that you want to display in two different units. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); /* the tick marks on each axis are independent */, /* use rounded values to display tick values */, /* Make sure the plots overlay exactly! For example, you might want to plot the revenue for a US company (in dollars) and the revenue for a Japanese company (in yen) for a certain time period. Then you can set SIZE=0 */, /* set the axes ranges to coresponding values */, "Overlay Measurements for Two Medical Devices", /* use Deming regression to find one set of ticks in terms of the other */, /* kiloOhms as a function of micrograms/dL */, /* the same offsets must be used in both YAXIS and Y2AXIS stmts */, "Create a SAS macro variable that contains a list of values. In this example, I demonstrate how to use PROC SGPLOT to draw simple box plots in SAS. Do you have a favorite way to customize a legend in PROC SGPLOT? If you look at the code linked below, you will see I have done just that. Rick Wicklin, PhD, is a distinguished researcher in computational statistics at SAS and is a principal developer of SAS/IML software. A series plot displays the values of a variable Y versus time or some other variable X, with consecutive points connected with line segments. lineattrs=(thickness=3) curvelabel However, as you will see, there is a problem with the default scaling of the two axes: The markers for the kilogram measurements should exactly overlap the markers for pounds, but they don't. Example 1: Grouping a Scatter Plot Example 2: Plotting Three Series Example 3: Adding Prediction and Confidence Bands to a Regression Plot Example 4: Adding a Prediction Ellipse to a Scatter Plot Example 5: Creating Lines and Bands from Pre-Computed Data Example 6: Adding Statistical Limits to a Dot Plot The following example shows measurements for a patient who receives a certain treatment. ATTRPRIORITY=NONE along with STYLEATTRS DATALINEPATTERSN=(SOLID) is usually my favorite variation on attribute priority with grouped data. By default, if you use the REG statement with the GROUP= option, the legend will show only the colors and line patterns for the regression lines. The data set has multiple columns, one each for the response for each drug. specifies the value of the ID variable in a range attribute map data set. The two axes are scaled by using the default method: In this graph, the Y axes are scaled independently. This paper focuses on one of those new procedures, the SGPLOT procedure. Options BREAK Thanks. Similarly, if you position the legend at the top or bottom of a graph, you might want to use the DOWN=1 option to list the items horizontally. ods graphics / reset attrpriority=color; Suppress the legend by using the NOAUTOLEGEND option. For example, the Sashelp.Class data records the weight for 19 students in pounds. The POSITION= option controls the placement of the legend on the graph (left, right, top, bottom,). A different way to solve the misalignment problem is to use the MIN=, MAX=, THRESHOLDMIN=, and THRESHOLDMAX= options on both axes. I encourage you to check ot the ODS Category and the Graph Category of my blog to see other examples of how to use ODS and Graphing in SAS. You can use proc sgplot to create line plots in SAS. ), The group levels contain missing values. You can see the result from this example below. Of course, the conversion from Japanese yen to the US dollars changes each day, but you can use an average conversion rate to set the correspondence between the axes. If you only want the confidence ellipse and regression line to appear in the legend, use the NAME= option to identify each component and use the KEYLEGEND statement to specify the contents of the legend: The KEYLEGEND statement supports the LOCATION= and POSTITION= options, which enable you to place the legend almost anywhere in the graph. However, sometimes the number of curves in a data set may vary from day to day. the company that manufactures the device used Deming regression to establish that the measurements from the two devices are linearly related by the equation Y = 10.56415 + 0.354463*X, where X is the measurement from the blood test. For each plot we have the option to set the plot attributes as we want such as the line color or pattern, or the thickness or other attributes. proc sgplot data =sashelp.iris; histogram sepallength; run; Result: Altering the Histogram in PROC SGPLOT Next, let us make adjustments to the plot. For example, if the purpose of a graph is to show income disparity between blacks and whites, you might decide not to include Asians or Hispanics in the legend: The group is binary. What can I add to the code below so that the mean & SE for the two groups will appear next to one-another for each year, and how can I customize the marker color and lineattrs for each group? Before it came along, we had a number of tricks like packing the legend title with additional legend information. To improve this graph, use the VALUES= and VALUESDISPLAY= options on the YAXIS statement (or Y2AXIS statement) to force the ticks marks on one axis to align with the corresponding tick marks on the other axis. For the record, what you request can also be done using VLINE statement using the raw data (with actually less code). Furthermore, I specify Species as the categorical variable in the category= option. Example 1: Grouping a Scatter Plot: Example 2: Plotting Three Series: Example 3: Adding Prediction and Confidence Bands to a Regression Plot: Example 4: Adding a Prediction Ellipse to a Scatter Plot: Example 5: Creating Lines and Bands from Pre-Computed Data: Example 6: Adding Statistical Limits to a Dot Plot: Example 7: Combining Histograms with Density Plots The histogram shows the distribution This paper covers the basic syntax of the SGPLOT procedure and provides a series of exercises that can be used to learn its basic functionality and features. The following DATA step uses the Deming regression estimates to convert the tick marks on the Y axis into values for the Y2 axis. For example, adding correlation coefficient 'R = 'in a scatter The range for the Y2 axis is [20, 70] kilograms, which corresponds to a range of [44.1, 154.3] pounds. 3. However, sometimes graphics are not enough. First, let us see how to draw a simple plot with Proc Sgplot. The plot is basically graphing the trend of cost over time. (Some other graphical elements support a CENTER position, but not the legend. We use the VBOX Statementin PROC SGPLOT and specify SepalLength as the analysis variable. The following statements show how to use the LEGENDITEM statement to create a customized legend. This paper is intended as a companion to a hands- . The following DATA view creates a new variable that records the same data in kilograms. You can download the entire code from this example here. Interesting. proc sgplot data=sashelp.class (where=(age < 13)); scatter x=name y=height; xaxistable age / class=age title="Student Age" location=inside valueattrs=(color=red) labelattrs=(color=red) titleattrs=(color=red); xaxistable weight height / valueattrs=(color=blue); run; Examples. You also might want to customize the items that appear in the legend in order to combine, for example, marker and line attributes. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Getting started with SGPLOT - Index - Graphically Speaking. His areas of expertise include computational statistics, simulation, statistical graphics, and modern methods in statistical data analysis. series x=date y=Drug_A / smoothconnect lineattrs=(thickness=3); Thanks. For example, you might use one axis to display the data in imperial units (pounds, gallons, degrees Fahrenheit, etc.) You must always write the new labels between double quotes. In such cases it is better to use the GROUP feature of the SERIES plot. First, let us look at a very simple example. xaxis display=(nolabel); Show='AttrMap' ensures that the legend appears in the order in which the values occur in the attribute map data set. Thanks for writing. You can use the Pounds column in the table to set the VALUES= list on the YAXIS statement. yaxis display=(noline noticks) grid; Suppress the legend. The LEGENDITEM statement (supported in SAS 9.4M5) enables you to specify what combination of markers and line patterns you want to appear for every item in a legend. proc sgplot data=<input-data-set> <options>; The audience is the user who is new to the SG Procedures. I need to graph the mean and SE of the variable COSTfor 2 groups of people (Age_group="Younger", "Older") in one plot. Example 3: Plotting Three Series. Furthermore, I show an example of how to modify the plot to your liking. After verifying that they align, you can use the MARKERATTRS=(SIZE=0) option to suppress the display of one of the markers. Creates a line plot. The tips are: By default, the SGPLOT procedure displays a legend when there are multiple plots that are overlaid in the graph. LEGENDITEM can be a big help. series x=date y=Drug_A / smoothconnect This graph shows the plot of "Drug_A" variable by Date. They'll tell you to use the MARKERCHAR=Name option in the SCATTER statement, or use the TEXT statement, which provides more control. Leave a comment! arrowheadpos=end arrowheadshape=barbed; That would be one way to show below the axis rows of values aligned with the axis ticks. Rick Wicklin, PhD, is a distinguished researcher in computational statistics at SAS and is a principal developer of SAS/IML software. In the example below, we use the LABEL =-option to change the labels of the X-axis and the Y-axis. The LOCATION= option contains the substring 'CAT'. For example: STYLEATTRS datacontrastcolors=(purple orange); If you also want to control how they are assigned, you can use a Discrete Attributes Map instead. Other SG procedures I simply specify the Histogram Statement followed by the variable I am interested in. For example, the following statements create a graph that consists of a scatter plot, a confidence ellipse, and a regression line.
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