How to display in GUI

Hello How to display an =

[ -1/pi, 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)]

in matlab GUI , I have use num2str but it does not work?

[Jan]

Please post your code and explain "does not work" with any details. How should this be displayed? As character string or as numbers?

[m]

will actually this is if I write an on the command winodw it will display an = [ -1/pi, 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)] the code is just calculation I want to display this result on the GUI, and if I use

set(handles.edit8,'String',num2str(an)) %%nothing is displayed!

[Jan]

@m:

 if I write an on the command winodw it will display
 an = [ -1/pi, 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)]

What exactly appears in the command window? Do you mean

an = [ -1/pi, 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)]
an =
 -0.3183         0    0.1061         0   -0.0637         0    0.0455

? Or do you mean the string

'[ -1/pi, 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)]'

?

Answer 1

[Stephen23]

Given a numeric vector, here is one way to generate a string to display:

>> vec = [ -1/pi, 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)]
vec =
  -0.31831   0.00000   0.10610   0.00000  -0.06366   0.00000   0.04547
>> [N,D] = rat(vec*pi);
>> C = arrayfun(@(n,d)sprintf('%d/(%d*pi)',n,d),N,D,'uni',0);
>> C = regexprep(C,'0/.*','0');
>> str = sprintf(', %s',C{:});
>> str = sprintf('[%s]',str(3:end))
str = [-1/(1*pi), 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)]

Answer 2

[Jan]

figure;
H = uicontrol('Style', 'edit', 'Units', 'normalized', 'Position', [0.01, 0.01, 0.98, 0.1]);
an = [ -1/pi, 0, 1/(3*pi), 0, -1/(5*pi), 0, 1/(7*pi)]
set(H, 'String', num2str(an))

Well, this works. Therefore I cannot reconsider, why "nothing is displayed" in your case. Perhaps the foreground color equals the background color of the edit field. Or the handles.edit8 is hidden behind another control. Or you do this in a loop and do not give Matlab the chance to update the display by a drawnow command. There can be a bunch of reasons. Please explain more details and post the relevant part of the code, which reproduces the problem.