Create a variable string array with different number of sig figs based on GUI dropdown

I have a GUI that has a drop down to change the number of sig figs used in the GUI.

p = 0.105;
n = 25;
%sigFigs = str2double(app.SigFigDropdown.Value);
sigFigs = 3;

if  sigFigs == 1
    s = sprintf("%.1f (N=%d)", p, n);
elseif  sigFigs == 2
    s = sprintf("%.2f (N=%d)", p, n);
elseif  sigFigs == 3
    s = sprintf("%.3f (N=%d)", p, n);
else
    s = sprintf("%.2f (N=%d)", p, n);
end
disp(s)

I'd like to simplify the code if possible to make it where the sig figs is a variable in the sprintf call or something similar to that. For example, something like what is below where the x is variable based on the value that is selected in the GUI dropdown but I know that won't actually work where the integer next to the %. is variable as well.

s = sprintf("%.xf (N=%d)",x=sigFigs, p, n);

Unsupported use of the '=' operator. To compare values for equality, use '=='. To pass name-value arguments using the name=value format, provide these arguments after all other inputs.

0.10 (N=25)

disp(s)

Answer 1

[Dyuman Joshi]

Use asterick to provide a value for field width -

p = 0.105;
n = 25;
%sigFigs = str2double(app.SigFigDropdown.Value);



for sigFigs = 1:3;
    fprintf('The output for sigFigs = %d', sigFigs)
    %              v
    s = sprintf("%.*f (N=%d)", sigFigs, p, n);
    disp(s)
end

The output for sigFigs = 1

0.1 (N=25)

The output for sigFigs = 2

0.10 (N=25)

The output for sigFigs = 3

0.105 (N=25)

[Patrick Kelly]

This is great. I never realized it was already implemented in sprintf. Thanks.