MATLAB: Plots are stuck on semi-log axis

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I have created an app that plots on UIAxes either with a plot command or semilogx command depending on a switch value. But once I have plotted with semilogx I am unable to revert to a linear x axis with subsequent executions of the code. The code snippet is shown below. The pasted image shows a bode response with points displayed with the red "x" called out in the regular plot command as opposed to the red "o" used in the semilogx command. I had set a breakpoint in the code and it clearly stopped in the 'Linear' case for every one of these plots. Why doesn't plot result in a linear x-axis?
                % Plot results
                switch app.FrequencyAxisSwitch.Value
                    case 'Linear'
                        plot(app.UIAxes2,fra_fvec(1:i_fra),mg21(1:i_fra),'rx');
                        plot(app.UIAxes3,fra_fvec(1:i_fra),ph21(1:i_fra),'rx');
                    case 'Logarithmic'
                        semilogx(app.UIAxes2,fra_fvec(1:i_fra),mg21(1:i_fra),'ro');
                        semilogx(app.UIAxes3,fra_fvec(1:i_fra),ph21(1:i_fra),'ro');
                end

Best Answer

I'm not sure you're going into the case you think you are, especially since the code for ylabel is not there so I can't tell which case you did. How/where are you setting the ylabel?
If you put a break point there at the switch, are you sure you're stepping into the linear one and doing the regular plot() call? What happens if you do this before the switch?
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