How to make a plot with multiple x points have equal spaced points?

I am trying to take a plot and make it have equal spacing.

I have tried interpolation but I get "The grid vectors must contain unique points" error

Not exactly sure how to fix this.

I've tried...

xx=min(FMX):0.01:max(FMX);
FMX=cumsum(ones(size(FMX)))*eps + FMX;
ind = diff(FMX)>0; % indices where dxmale is nonzero 
MY = interp1(FMX(ind),FMY(ind),xx);

&&

xx=min(FMX):0.01:max(FMX);
ind = diff(FMX)>0; % indices where dxmale is nonzero 
MY = interp1(FMX(ind),FMY(ind),xx);

Answer 1

[Sulaymon Eshkabilov]

You can try unique() to remove some overlapping points and then interpolate.

[Tasha Williams]

I tried that it did not work. There's a need for both x values.