topic Std not defined in Map Algebra in ArcGIS Spatial Analyst Questions https://community.esri.com/t5/arcgis-spatial-analyst-questions/std-not-defined-in-map-algebra/m-p/475902#M6843 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I'm trying to do a simple task:&nbsp; calculate the Standard Deviation of some 50 rasters, with an output of cell-by-cell StDev values.&nbsp; The help file says it can be done in Map Algebra, and provides the syntax Std (&lt;inraster1&gt;,&lt;inraster2&gt;,,,,).&nbsp; When I do this, the error says "Std" is not defined.</SPAN><BR /><BR /><SPAN>In reviewing the forums, I haven't found this specific question addressed.&nbsp; I've found more complicated, but similar, questions which received advice that one needs to first calculate the average, then variance, then standard deviation.&nbsp; I'm hoping that this step by step process was only necessary due to the complicating details of the poster's particular problem.&nbsp; </SPAN><BR /><BR /><SPAN>Please - anyone know how to accomplish this simple task without typing in the algebra for each step in the StDev calculation????</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Cathy</SPAN></BODY></HTML> Tue, 01 Nov 2011 22:24:21 GMT CathyReidy_Liermann 2011-11-01T22:24:21Z Std not defined in Map Algebra https://community.esri.com/t5/arcgis-spatial-analyst-questions/std-not-defined-in-map-algebra/m-p/475902#M6843 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I'm trying to do a simple task:&nbsp; calculate the Standard Deviation of some 50 rasters, with an output of cell-by-cell StDev values.&nbsp; The help file says it can be done in Map Algebra, and provides the syntax Std (&lt;inraster1&gt;,&lt;inraster2&gt;,,,,).&nbsp; When I do this, the error says "Std" is not defined.</SPAN><BR /><BR /><SPAN>In reviewing the forums, I haven't found this specific question addressed.&nbsp; I've found more complicated, but similar, questions which received advice that one needs to first calculate the average, then variance, then standard deviation.&nbsp; I'm hoping that this step by step process was only necessary due to the complicating details of the poster's particular problem.&nbsp; </SPAN><BR /><BR /><SPAN>Please - anyone know how to accomplish this simple task without typing in the algebra for each step in the StDev calculation????</SPAN><BR /><BR /><SPAN>Thanks,</SPAN><BR /><SPAN>Cathy</SPAN></BODY></HTML> Tue, 01 Nov 2011 22:24:21 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/std-not-defined-in-map-algebra/m-p/475902#M6843 CathyReidy_Liermann 2011-11-01T22:24:21Z Never Mind!!! https://community.esri.com/t5/arcgis-spatial-analyst-questions/std-not-defined-in-map-algebra/m-p/475903#M6844 <HTML><HEAD></HEAD><BODY><SPAN>It's in Cell Statistics...duh!!!</SPAN></BODY></HTML> Tue, 01 Nov 2011 22:30:41 GMT https://community.esri.com/t5/arcgis-spatial-analyst-questions/std-not-defined-in-map-algebra/m-p/475903#M6844 CathyReidy_Liermann 2011-11-01T22:30:41Z