topic Re: Transformations for converting data into normaly distributed in ArcGIS GeoStatistical Analyst Questions https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/transformations-for-converting-data-into-normaly/m-p/699451#M1566 <HTML><HEAD></HEAD><BODY><SPAN>You have a data value equal to 0, so the logarithmic and Box-Cox transformations won't work (the data has to be all positive).&nbsp; And you have data bigger than 1, so ArcSin won't work (all data has to be between 0 and 1).&nbsp; </SPAN><BR /><BR /><SPAN>There's also a Normal Score transformation (NST), but you only have 11 points, and that isn't near enough to do a valid NST.&nbsp; </SPAN><BR /><BR /><SPAN>With only 11 points, don't use kriging.&nbsp; We say that you should have at least 30 points to even attempt kriging, but you really should have 100 or more.</SPAN></BODY></HTML> Mon, 27 Feb 2012 14:19:58 GMT EricKrause 2012-02-27T14:19:58Z Transformations for converting data into normaly distributed https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/transformations-for-converting-data-into-normaly/m-p/699450#M1565 <HTML><HEAD></HEAD><BODY><SPAN>During analysis of data from a histogram how can i decide what transformations to use ...</SPAN><BR /><SPAN>Also for some entries histogram does not has an option of transformations .[ATTACH=CONFIG]12245[/ATTACH]</SPAN></BODY></HTML> Mon, 27 Feb 2012 11:03:32 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/transformations-for-converting-data-into-normaly/m-p/699450#M1565 YatharthMathur 2012-02-27T11:03:32Z Re: Transformations for converting data into normaly distributed https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/transformations-for-converting-data-into-normaly/m-p/699451#M1566 <HTML><HEAD></HEAD><BODY><SPAN>You have a data value equal to 0, so the logarithmic and Box-Cox transformations won't work (the data has to be all positive).&nbsp; And you have data bigger than 1, so ArcSin won't work (all data has to be between 0 and 1).&nbsp; </SPAN><BR /><BR /><SPAN>There's also a Normal Score transformation (NST), but you only have 11 points, and that isn't near enough to do a valid NST.&nbsp; </SPAN><BR /><BR /><SPAN>With only 11 points, don't use kriging.&nbsp; We say that you should have at least 30 points to even attempt kriging, but you really should have 100 or more.</SPAN></BODY></HTML> Mon, 27 Feb 2012 14:19:58 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/transformations-for-converting-data-into-normaly/m-p/699451#M1566 EricKrause 2012-02-27T14:19:58Z