BLAND ALTMAN PLOT SAS MACRO

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The symbol statement is used specify the shape and colour of the symbol that will be used in the graph. To find out more, including how to control cookies, see here: Sanjay Matange on January 4, 1: Tuesday, June 5, Example 9. Thanks for your suggestions, James. On building the graph, it became apparent that this graph could be a good example of how to use the layering capabilities of the SGPLOT procedure and GTL to create a graph that is made up of multiple separate components. One still has to set up a separate dataset and sometimes create space for the annotations, so I prefer to set that up in the plot data itself, when possible.

This graph is similar in construction to the Clarke Error Grid, where there are certain zones in the graph depicted by boundaries with labels along with actual data points. There is a risk here that you will cut off any larger outliers– they would not show on your plot, which I don’t think was your intent. Here the 2 assessments will be referred to as new and old. Home Bio Services Contact. But for myself, I’m happy with the standard limits. I’d also like sgplot to have a marker statement, e.

In my opinion, having all data in the plot dataset instead of hard coded in the program, or separately provided in sganno data makes the program more extensible and usable with other data. Drawing the grid using plot statements including new Polygon plot allows you to interleave this into the rest of your graph and work with legend and attrmaps. Here is the data set needed to draw the bands, the graph and the code:.

James Marcus on January 4, 4: You took the time to demonstrate the deparse substitute varname functionality but then used the same variable names x and y to call the function.

Leave a Reply Cancel reply Enter your comment here Click on the graph for a higher resolution image: Stay tuned for sxs articles on SAS 9. Now, we layer a Scatter plot with MarkerChar option on top of the Band plot to display these two labels using the three new columns. I’m aware that SGANNO could accomplish some of what I’ve suggested and am a little surprised maco wasn’t the approach you advocated in your blog post ,but I still think the changes I suggest would be very helpful.

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The first graphs shows the band names in the legend.

Leave A Reply Cancel Reply. To place the labels in the middle of the graph, we add two data points xl, yl and a label. Here is the data set needed to draw the bands, the graph and the code: There are a number of ways to do this, plto here is how to do it using a data step: I’m Eric Cai, and I love statistics and chemistry.

Since there is no overlap with any column names, a simple merge works just fine. An experienced SAS user will know to do this, but a beginner won’t – leading to frustration; besides, conceptually the annotation elements should be separate from the mwcro data. Follow me on Twitter chemstateric. You are commenting using your Twitter account. April 16, at You are commenting using your WordPress. If you have lots of such objects say for drawing the Clarke Error Gridss is easier to set that up in blane plot data set or as a separate sganno data set.

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SAS Bland Altman Analysis

I use annotation only when all else fails. On building the graph, it became apparent that this graph could be a good example of how to use the layering capabilities of the SGPLOT procedure and GTL to create a graph that is made up of multiple separate components.

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I enjoy sharing my advice on career development. The axis statement specifies the smallest and largest values to include on the vertical axis. This site uses cookies. There are a number of ways to do this, but here is how to do it using a data step:. Create the Bland-Altman plot.

SAS Bland-Altman Analysis | SAS Bland Altman Plot – DataFlair

But for myself, I’m happy with the standard limits. If I read your code correctly, you are forcing the y-axis to stop at 3 times the SD, plus or minus.

Now, it’s time to expand features like that so that kludges of adding a few extra columns and data points to pplot extant data set are no longer necessary. However, in the example sent to me by user, each band was directly labeled and no legend was blanv. Twitter Facebook Google LinkedIn.

Here the 2 assessments will be referred to as new and old. I find it much less opaque to order things done in the sgplot procedure, than to contort the dataset behind the scenes or to build a separate instruction set.

Again, there are several ways to altma this.

SAS Bland-Altman Analysis | SAS Bland Altman Plot

These will be used in a later step to create reference lines on the Bland-Altman plot. Thanks for your suggestions, James.

To find out more, including how to control cookies, see here: It reminded me of the 9. Fill in your details below or click an icon to log in: July 31, at 1: Email required Address never made public. You are commenting using your Facebook account.