Thread Subject: Adding Text columns to a Matrix

Hello,

I have created a variable A = zeros(5,5). The first three columns contain double values. I have another variable which contains strings for example 'Yes' or 'No'. I am trying to add this variable to A(:,4) (to make it as the fourth column) but I keep getting an error which says " The following error occurred converting from cell to double:
Error using ==> double
Conversion to double from cell is not possible."

I am not sure what I am doing wrong. It should be quite straight forward. Can someone help?

Thanks

"Raju Gain" <supernova5271@yahoo.com> wrote in message <garivv$sni$1@fred.mathworks.com>...
> Hello,
>
> I have created a variable A = zeros(5,5). The first three columns contain double values. I have another variable which contains strings for example 'Yes' or 'No'. I am trying to add this variable to A(:,4) (to make it as the fourth column) but I keep getting an error which says " The following error occurred converting from cell to double:
> Error using ==> double
> Conversion to double from cell is not possible."
>
> I am not sure what I am doing wrong. It should be quite straight forward. Can someone help?
>
> Thanks

Search the documentation for information on creating a cell array. This will hold both numerical and text data.
Barry

"Raju Gain" <supernova5271@yahoo.com> wrote in message <garivv$sni$1@fred.mathworks.com>...
> Hello,
>
> I have created a variable A = zeros(5,5). The first three columns contain double values. I have another variable which contains strings for example 'Yes' or 'No'. I am trying to add this variable to A(:,4) (to make it as the fourth column) but I keep getting an error which says " The following error occurred converting from cell to double:
> Error using ==> double
> Conversion to double from cell is not possible."
>
> I am not sure what I am doing wrong. It should be quite straight forward. Can someone help?
>
> Thanks

% This should get you started:

A = zeros(5,5)
B = num2cell(A)

B{4,1} = 'yes'
B{1,4} = 'no'

% etc.

"Raju Gain" <supernova5271@yahoo.com> wrote in message <garivv$sni$1@fred.mathworks.com>...

> I have created a variable A = zeros(5,5). The first three
> columns contain double values. I have another variable
> which contains strings for example 'Yes' or 'No'. I am
> trying to add this variable to A(:,4)

You cannot mix data classes in a single array. You cannot
have text in a numeric array.

The closest you can get is the approach the other poster
suggested, which is to use a cell array -- or you could
use a structure which had a field for the numerics and
another field for the text. But neither cell arrays
nor structures will display "nicely" as columns of numbers
intermixed with columns of text.

Thanks everyone..
Got it working..


"Walter Roberson" <roberson@ibd.nrc-cnrc.gc.ca> wrote in message <garkd2$ifv$1@fred.mathworks.com>...
> "Raju Gain" <supernova5271@yahoo.com> wrote in message <garivv$sni$1@fred.mathworks.com>...
>
> > I have created a variable A = zeros(5,5). The first three
> > columns contain double values. I have another variable
> > which contains strings for example 'Yes' or 'No'. I am
> > trying to add this variable to A(:,4)
>
> You cannot mix data classes in a single array. You cannot
> have text in a numeric array.
>
> The closest you can get is the approach the other poster
> suggested, which is to use a cell array -- or you could
> use a structure which had a field for the numerics and
> another field for the text. But neither cell arrays
> nor structures will display "nicely" as columns of numbers
> intermixed with columns of text.