How do I get exponent values for log axes in MATLAB R2014b?

I have a plot created using the 'semilogx' function. I am trying to access the exponent values for the tick labels for the 'x' axis. In MATLAB R2014a, I could access the exponent values using the command:

ticks = get(gca,'XtickLabel') which would return a character array of exponent values for the ticks. How do I do the same task in MATLAB R2014b?

Answer 1

[MathWorks Support Team]

Starting in R2014b, the XTickLabel, YTickLabel, or ZTickLabel properties for a log axis contain cell arrays with the full TeX markup used for the tick labels. In previous releases these properties contain a character array with only the exponent values for the tick marks.

Starting in R2014b, this code returns the tick labels a cell array with the full TeX markup:

semilogx(1:10000);

ax = gca;

ticks = ax.XTickLabel

 

ticks = 

 

    '10^{0}'

    '10^{1}'

    '10^{2}'

    '10^{3}'

    '10^{4}'

 

 

class(ticks)

 

ans =

 

cell

In R2014a and earlier, this code returns a character array with the exponent values:

semilogx(1:10000);

ax = gca;

ticks = get(ax,'XTickLabel')

ticks =

 

0

1

2

3

4

class(ticks)

 

ans =

 

char

To extract just the exponent values from the tick label property, use the regexprep function with the following syntax.

expression = '\d*\^\{(\-?\d*)\}'; 

replace = '$1'; 

exponents = regexprep(ticks,expression,replace)

 

exponents =      '0'    '1'    '2'    '3'    '4' 

Documentation for the regexprep function is available at the following link:

https://www.mathworks.com/help/matlab/ref/regexprep.html