table2array gives string array when contents are numbers

Whenever I try to convert an table of numbers into an array, instead I will get a string array with all my numbers listed inside quotemarks. When I try to access it with {} which is reccommended elsewhere in matlab answers then the problematic column that I just added to the matrix here just dissapears entirely

The line giving the issue is

channel5mmyeild= table2array([sr_p, x5mmlinyeild]);

Anyone have any idea what could be causing this?

Cheers

Answer 1

[Cris LaPierre]

I suspect data in sr_p and x5mmlinyeild are chars or strings and not doubles. What is the data type of the columns of your table? Look at the results of summary(sr_p) and summary(x5mmlinyeild).

If that doesn't seem to be the problem, please save your variables to a mat file and attach them to your post using the paperclip icon.

[Em]

Yes you' were right - 'x5mmlinyeild' is a table of strings.

I've tried

str2num(table2array(x5mmlinyeild))

but it isn't working. Do you have a suggestion on what I need to do next?

[Cris LaPierre]

How many variables are in the table? How do you create x5mmlinyeild? I would set it up so that the values are doubles.

Still, converting is fairly simple. Here's a simple example.

str = "10";
x5mmlinyeild = table(str);
N=5;
sr_p = table(N);

% Convert table variable(s) to double first
x5mmlinyeild.str = str2double(x5mmlinyeild.str);
channel5mmyeild= table2array([sr_p,x5mmlinyeild])

channel5mmyeild = 1×2

5 10

●

It would also appear that, when operating on a table of strings, table2array converts a table of strings to doubles.

table2array(x5mmlinyeild)

ans = 10

It is the mixed case that appears to have caused trouble. In that case, it elected to make everything strings instead of everything doubles.

[Em]

Thank you!