problem to convert string

hi, i try use:

num2str(app.UITable.Data(:,15))

{app.UITable.Data(:,15)}

d=str2double(app.UITable.Data(:,15))

i receive always error

disp(app.UITable.Data(:,15));

d=str2double(app.UITable.Data(:,15)); %%trovo i "selezionati"

sel=find(d==1);

app.UITable.Data(sel,4)= string(app.Trading(2)); %gli assegno il valore "from strategy"

{[1]}

{[1]}

{[1]}

{[1]}

{[1]}

{[1]}

{[1]}

{[1]}

{[1]}

{[1]}

{[1]}

Unable to perform assignment because value of type 'string' is not convertible to 'cell'.

Error in PredatorManageStrategie/OnFullMenuSelected (line 249)

app.UITable.Data(sel,4)= string(app.Trading(2)); %gli assegno il valore "from strategy"

Error in matlab.apps.AppBase>@(source,event)executeCallback(ams,app,callback,requiresEventData,event) (line 62)

newCallback = @(source, event)executeCallback(ams, ...

Answer 1

[Voss]

I assume that the cell array of numeric 1's shown in the question is the result of the disp(app.UITable.Data(:,15)); line, and that what we see there is the whole column 15.

In that case, it's doesn't make sense to do str2double on app.UITable.Data(:,15) since it already contains numeric data (and not character arrays or strings).

Instead, concatenate the contents of the cells of column 15 together into the numeric vector d and find where d == 1:

d = [app.UITable.Data{:,15}]; %%trovo i "selezionati"
sel = find(d == 1);

Then set the corresponding cells in column 4 to app.Trading(2), converted to a string and wrapped in {} to make it a scalar cell array to match the type of app.UITable.Data, which is also a cell array:

app.UITable.Data(sel,4) = {string(app.Trading(2))}; %gli assegno il valore "from strategy"