make header from numeric array

Hi,

I have a numeric array and want to concatenate each element with a string. As I will use the new array as a header, it needs to end up as a cell array.

i am trying:

wl_arr = 400:1.85:2400;
hdr = strcat('L_conv_', num2cell(wl_arr));

but get this:

I also tried:

wl_arr_str = num2str(wl_arr);
rad_conv_hdr1 = strcat('L_conv_', wl_arr_str);

[Walter Roberson]

"L_conv_" + wl_arr

Provided you have r2017a or later

[Andrew Longmire]

Thanks a lot for speedy answer. However,

The VariableNames property must be a cell array, with each element containing one nonempty character vector.

[Walter Roberson]

Your code does not use table objects so it is not clear why you have that error.

Answer 1

[Bruno Luong]

hdr = arrayfun(@(x) sprintf('L_conv_%f', x), wl_arr, 'unif', 0)

[Andrew Longmire]

thanks Bruno.

can i limit the number of dp printed in the header?

[Bruno Luong]

Play with the format

hdr = arrayfun(@(x) sprintf('L_conv_%3.1f', x), wl_arr, 'unif', 0)

[Andrew Longmire]

great thanks!