topic Re: How to select individual cell based on condition? in Discussions

How to select individual cell based on condition?

davyvy — Sun, 11 Sep 2016 09:07:17 GMT

How to select individual cell instead of entire rows?

In table below, I need to select the two -99 cells under Value1 and Value2 column, and delete them. Can someone help? When I used select where, the entire row is selected.

test1	Value1	test2	Value2
2	5	3	1
3	5	4	-99
4	-99	5	443
-88	7	6	234
77	9	-76	3
5	0	65	45

Thanks

Re: How to select individual cell based on condition?

txnelson — Sun, 11 Sep 2016 13:37:40 GMT

Selecting a single cell, in the context of "Select Where" isn't really available. But addressing a single cell can be done and then the cell value can be changed, or the cell color can be changed. Here is an example of how to do this:

Names Default to Here(1);

dt=current data table();

dt:Value 2 << color cells("Red", dt<<get rows where(dt:Value 2 == -99));

Re: How to select individual cell based on condition?

Phil_Brown — Mon, 12 Sep 2016 09:00:57 GMT

davyvy,

One approach is to simply clear the value of the cell and replace it with missing value (essentially same as delete). So..

:Value1 << Set Each Value( If( Value1[ ] == -99, ., Value1[ ] ) );

:Value2 << Set Each Value( If( Value2[ ] == -99, ., Value2[ ] ) );

I've found that Set Each Value is quite fast. I ran a test on a 5 column, 6.6M row table and each of the operations above completed in ~2s.

Re: How to select individual cell based on condition?

jerry_cooper — Mon, 12 Sep 2016 16:12:53 GMT

Just in case you were looking for a non-scripting approach, you could use search and replace (Ctrl+F), or you could use Column Properties and set -99 as a missing value code. If you use the search option, be sure to leave the Replace With box empty (i.e no space).

Re: How to select individual cell based on condition?

ron_horne — Mon, 12 Sep 2016 17:12:29 GMT

alternatively, you can use the recode option to change the -99 to missing values or whatever value you want. just right click the column from the column list on the left and select recode. the rest is self explanatory.