If condition with a cell include both number string and text string?

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Khanh
Khanh on 21 Oct 2014
Commented: Khanh on 22 Oct 2014
Hi everyone,
I have a cell:
mycell ={'text','-1','0','','textnumber01234','3123','0.111'}
I'm trying using if condition for showing a error window with each value of each cell element except two last elements ('3123','0.111'). These string elements which are converted to number by str2double have values greater than 0.
mycell={'text','-1','0','','text-with-number01234','3123','0.111'}
for ii=1:length(mycell)
if strcmp(mycell(ii),'') || str2num(mycell(ii))<=0 || isempty(mycell(ii))
% --- FIGURE -------------------------------------
figure1= figure( ...
'Tag', 'figure1', ...
'Units', 'pixels', ...
'Position', [515 655 310 90], ...
'Name', 'Wrong format data', ...
'MenuBar', 'none', ...
'NumberTitle', 'off', ...
'Color', [0.941 0.941 0.941]);
% --- STATIC TEXTS -------------------------------------
uicontrol( ...
'Parent', figure1, ...
'Tag', 'text1', ...
'Style', 'text', ...
'Units', 'pixels', ...
'Position', [25 17 250 50], ...
'FontSize', 10, ...
'String', {'Please enter right format data'}, ...
'HorizontalAlignment', 'left');
return
end
end
My code doesn't work properly.
Could someone help me?
Thanks.

Accepted Answer

Robert Cumming
Robert Cumming on 21 Oct 2014
Edited: Robert Cumming on 21 Oct 2014
The problem here is the use of str2num in your conversion and the fact one of your inputs is text (which is a matlab function name which returns a handle), try:
str2num ( 'text' )
the result may surprise you....
the quirky result is because str2num uses eval. - str2double is generally a much better solution, with that in mind see below:
mycell={'text','-1','0','','text-with-number01234','3123','0.111'};
index = cellfun ( @str2double, mycell );
flags = ~(isnan(index) + index>0);
for ii=1:length(mycell)
if flags(ii)
% --- FIGURE -------------------------------------
figure1= figure( ...
'Tag', 'figure1', ...
'Units', 'pixels', ...
'Position', [515 655 310 90], ...
'Name', 'Wrong format data', ...
'MenuBar', 'none', ...
'NumberTitle', 'off', ...
'Color', [0.941 0.941 0.941]);
% --- STATIC TEXTS -------------------------------------
uicontrol( ...
'Parent', figure1, ...
'Tag', 'text1', ...
'Style', 'text', ...
'Units', 'pixels', ...
'Position', [25 17 250 50], ...
'FontSize', 10, ...
'String', {'Please enter right format data'}, ...
'HorizontalAlignment', 'left');
return
end
end

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