how to get the column names of one matrix and assign nan to them

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Danielle Leblance 2018-2-8

编辑： Walter Roberson 2018-2-8

A=[A1,A2] ;

where A, A1,A2 are tables

I want to build matrix B such as:

B=[B1,A2];

but this time A2 is the same as A2 above but with nan values;

A2 is 300 columns and assigning the names column by column is a tedious thing to do .

Any help is appreciated

Image Analyst 2018-2-8

It's easier for us to try things and to help you if you attach your workbook and the code to read it in.

Bob Thompson 2018-2-8

If all you want is to have an array A2, that is the size of the original A2, but is a bunch of NaN, you should be able to say:

A3 = A2;
A3(:,:) = NaN;

That should get the size of A2 by copying, and then assign all members to be NaN.

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