MATLAB: Please re-sampling , interpolation and smoothing matlab code

I also need to know how to apply re-sampling , interpolation and smoothing for the x,y coordinates that are saved in a text file as two columns when I implement the matlab functions of (resample) or (interp) or (smooth) the result plotted isn't as I want .. the character shape changes .

Best Answer

If you are dealing with characters and need to preserve their shape as characters, you should consider using spline fitting.

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MATLAB: Signal Non-uniform re-sampling

Try interp1()

t =  t=0:dt:64-dt; % [625000x1] vector 
y_t = [625000x1] signal
h_t = sqrt(t.^2+const); % transformation
y_h_t = interp1(t, y_t, h_t);

It will give you interpolated y_h_t for the given vector h, you can specify the type of interpolation in the options of interp1.

MATLAB: Interpolation method (spline)

From the documentation:

'spline':

‘Spline interpolation using not-a-knot end conditions. The interpolated value at a query point is based on a cubic interpolation of the values at neighboring grid points in each respective dimension.’

It does not appear to be the same as 'cubic'. According to the documentation, 'cubic' is currently the same as 'pchip'.

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Related Solutions

MATLAB: Signal Non-uniform re-sampling

MATLAB: Interpolation method (spline)

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