Extract a range of a given cell array

I would like, trough a GUI, e.g.:

prompt={'Insert range'}
defans={'Insert range'}
fields = {'num'}
info = inputdlg(prompt, 'Insert handrange', 1, defans)
if ~isempty(info)              
   info = cell2struct(info,fields)
   mynum = str2num(info.num)   
end

to extract a range of a given cell array, say:

cellarray={'A','B','C','D','E','F','G','H','I','J','K','L'};

in three different ways:

a) 30 [i.e. 0-30%]

b) 3-7 [i.e. 3-7%]

c) 40- [i.e. 40-100%]

Note that I would like to use a symbol (in this case "-" to denote case c).

How do I make Matlab choose 0-30% using '30' and so forth for the cases b) and c) ?

Answer 1

[Thomas]

cellarray={'A','B','C','D','E','F','G','H','I','J','K','L'};

prompt1={'Insert start in %'};
prompt2={'Insert End in %'};
defans1={'Start Value'};
defans2={'End Value'};
fields = {'num'};
info1 = inputdlg(prompt1, 'Input start', 1, defans1);
if ~isempty(info1)              
   info1 = cell2struct(info1,fields);
   mynum1 = str2num(info1.num)   ;
end

info2 = inputdlg(prompt2, 'Input end', 1, defans);
if ~isempty(info2)              
   info2 = cell2struct(info2,fields);
   mynum2 = str2num(info2.num)   ;
end

len_array=length(cellarray);
start_val=round(mynum1*len_array/100);
if start_val==0
    start_val=1;
end

end_val=round(mynum2*len_array/100);

output=cellarray(start_val:end_val)

[Thomas]

your inputs need to be in percent eg. o, 10 , 30 , 40 etc..

[Ole Hansen]

Hi

Thank you very much for the reply. The GUI must, however, be able to interpret ranges as given in the original poster with case a and b. That is, if I would like to enter 0%-30% then I should enter '30' and not both '0' and '30' using two different prompts. In the case of a midrange, e.g. 25%-55%, then I should enter '25-55'. Note that I use the minus sign inbetween (any other symbol, for instance a comma, will also work - but I should be able to do both case a and b using only one prompt in the inputdlg-function). Case c can be neglected, but case a and b are necessary.

Is that possible?

[Thomas]

cellarray={'A','B','C','D','E','F','G','H','I','J','K','L'};

prompt1={'Insert range in % Eg 1-30'};

defans1={'Start Value'};

fields = {'num'};

info1 = inputdlg(prompt1, 'Input range', 1, defans1);

pos=cell2mat(strfind(info1,'-'));

a=cell2mat(info1);

start_val=str2num(a(1:pos-1));

end_val=str2num(a(pos+1:end));

len_array=length(cellarray);

start_val=round(start_val*len_array/100);

if start_val==0

start_val=1;

end

end_val=round(end_val*len_array/100);

output=cellarray(start_val:end_val)