MATLAB Answers


Uitable data converison for user precision

Asked by Jason
on 24 Feb 2019
Latest activity Commented on by Jason
on 24 Feb 2019
Hello, I have a uitable with double values:
data =
374.35 406.81 383.00 336.46 297.88
436.10 362.88 303.35 245.88 199.66
189.35 200.21 218.86 223.13 204.46
341.85 322.08 288.71 239.71 203.11
I am wanting to display these in the uitable with only 1 decimal place (they are currently displayed as 4 decimal places)
I found the following on this site:
%Convert to user precision
data = get(t, 'data')
for i = 1:numel(data)
% if(isnumeric(data{i}))
tempStr = sprintf('%2.4g', data{i});
data{i} = tempStr;
% end
set(t, 'data', data);
However I get the error "Cell contents referenced from a non-cell array object" in this line tempStr = sprintf('%2.4g', data{i});


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1 Answer

Answer by Stephen Cobeldick on 24 Feb 2019
Edited by Stephen Cobeldick on 24 Feb 2019
 Accepted Answer

Your data is numeric, not a cell array.
You already answered your own question when you wrote "I have a uitable with double values..:"
You originally created the UITABLE with numeric data, so its data will still be numeric when you access it later. It will not change into a cell array.
"I found the following on this site: "
That code applies to a UITABLE that was created using a cell array, so its data will still be a cell array when it is accessed later. It appears that you got that code from this thread, where data is clearly defined as a cell array:
There are two ways to control the format of numeric data shown in a UITABLE:
  1. Create the UITABLE using numeric data, setting the ColumnFormat option, which supports similar options as format does (long, short, bank, etc).
  2. Create a cell array of character vectors from the numeric data and use that cell array to create the UITABLE.
Only the second option lets you specify an arbitrary number of decimal digits and total control over the formatting.


Thanks Stephen.
I have used your option 1 before and I like that method but I dont have a fixed number of columns. Are you aware of using this method with a variable number of columns?
@Jason: why not just use repmat?:
C = repmat({'yourFormatChoice'},1,numberOfColumns);
uitable(...., 'ColumnFormat',C)
Perfect, thankyou

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