How to interpolate the data inside the polygon?

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TAPAS 2022-12-6

回答： KSSV 2022-12-9

I have the data in the vertical column( A,B,C,D,E,F,G,H) and the solid dot in each column represents the data location.

I want to interpolate the data inside the polygon(KLMNOPQRSTU) only ,as given in the attached figure.

KSSV 2022-12-7

TAPAS 2022-12-9

I tried but getting an absurd figure

KSSV 2022-12-9

T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1222307/Book2.xlsx') ;

x = T.X ;

y = T.Y ;

z = T.Z ;

[X,Y] = meshgrid(min(x):90:max(x),min(y):1:max(y)) ;

Z = griddata(x,y,z,X,Y) ;

pcolor(X,Y,Z)

h = pcolor(X,Y,Z) ;

h.EdgeColor = 'none' ;

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