MATLAB: When using listdlg to create a menu, how do you access the user input

indxlistlistdlgmenu

I'm writing a script which gives the user 10 coundries of which they must pick 2. I'm using listdlg for the menu, but how do I view/display their choices?

This is what I've got so far…

cList = {'United Kingdom','Bulgaria','Germany','Greece','Sweden','Netherlands','Spain','Romania','Luxembourg','Poland'};
[indx,tf] = listdlg('PromptString','Select 2 countries to study','ListString',cList);

the variable indx gives the number of the countries selected (eg UK=1,Bulgaria=2…), and cList is a 1×10 cell

Thanks in advance.

Best Answer

>> cList = {'United Kingdom','Bulgaria','Germany','Greece','Sweden','Netherlands','Spain','Romania','Luxembourg','Poland'};
[indx,tf] = listdlg('PromptString','Select 2 countries to study','ListString',cList);
>> indx
indx =
     4     9
>> cList(indx)
ans =
  1×2 cell array
    {'Greece'}    {'Luxembourg'}
>>

You just use the indices return to index into the list.

However, you can't control how many the user actually selects; it's either 'Single' or 'MultiSelect' on input and you only know how many the user selected when he returns.

You'll have to write code to test the size of the return array and decide how to handle the cases when user doesn't follow instructions.

Related Solutions

MATLAB: How can we find the non common strings from multiple columns

First lets find the strings that are common to all cell arrays:

listA={'India','Iran','Ireland','Israel','Jordan','Kuwait','Lebanon','Lesotho','Libya','Luxembourg','Malawi','Maldives','Morocco','Nepal','Netherlands','Norway','Oman','Paraguay','Peru','Philippines',};
listB={'Denmark','El Salvador','Gabon','Gambia','Lebanon','Lesotho','Libya','Luxembourg','Malawi','Maldives','Morocco','Nepal','Netherlands','Norway','Oman','Paraguay','Peru','Philippines','Qatar','Rwanda','Saudi Arabia','Senegal','Singapore','Sudan'};
listC={'Kuwait','Lebanon','Lesotho','Nepal','Netherlands','Oman','Sweden','Syria','Tanzania','Turkey','Uruguay'};
%

lists = {listA,listB,listC}; % storing data together makes working with them much simpler.
%
exc = lists{1};
for k = 2:numel(lists)
    exc = intersect(exc,lists{k});
end

giving the strings found in all cell arrays as:

 exc =
    'Lebanon'
    'Lesotho'
    'Nepal'
    'Netherlands'
    'Oman'

Now we can easily get the input cell arrays with the strings from exc removed:

out = cell(size(lists));
for k = 1:numel(lists)
    out{k} = setdiff(lists{k},exc);
end

giving:

>> out{:}
ans = 
    'India' 'Iran' 'Ireland' 'Israel' 'Jordan' 'Kuwait' 'Libya' 'Luxembourg' 'Malawi' 'Maldives' 'Morocco' 'Norway' 'Paraguay' 'Peru' 'Philippines'
ans =
    'Denmark' 'El Salvador' 'Gabon' 'Gambia' 'Libya' 'Luxembourg' 'Malawi' 'Maldives' 'Morocco' 'Norway' 'Paraguay' 'Peru' 'Philippines' 'Qatar' 'Rwanda' 'Saudi Arabia' 'Senegal' 'Singapore' 'Sudan'
ans =
    'Kuwait' 'Sweden' 'Syria' 'Tanzania' 'Turkey' 'Uruguay'

And if you want a list of all strings together, excluding those in exc:

uni = {};
for k = 1:numel(lists)
    uni = union(uni,lists{k});
end
uni = setdiff(uni,exc)

gives:

uni =
    'Denmark' 'El Salvador' 'Gabon' 'Gambia' 'India' 'Iran' 'Ireland' 'Israel' 'Jordan' 'Kuwait' 'Libya' 'Luxembourg' 'Malawi' 'Maldives' 'Morocco' 'Norway' 'Paraguay' 'Peru' 'Philippines' 'Qatar' 'Rwanda' 'Saudi Arabia' 'Senegal' 'Singapore' 'Sudan' 'Sweden' 'Syria' 'Tanzania' 'Turkey' 'Uruguay'

MATLAB: Put workspace data into menu and prompt someone to select it

Inorder to prompt user to select data from excel sheet.

First load the data from excel sheet into workspace, inorder to achieve this use function like readtable, readmatrix, readcell
In order to prompt user to select data, use listdlg function which create a list selection dialogue box. listdlg function only takes strings so convert the numeric data into string format using string function

As an example

data=readtable('mydata.xlsx'); % contains date, day, temperature
% is you want user to select temperature then convert temperature values into string datatype
temperature = string(data.temperature);
[indx,tf] = listdlg('ListString',temperature); %prompts user to select data

Best Answer

Related Solutions

MATLAB: How can we find the non common strings from multiple columns

MATLAB: Put workspace data into menu and prompt someone to select it

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