linear interpolation
[y]=interpln(xyd,x)
2 row matrix (xy coordinates of points)
vector (abscissae)
vector (y-axis values)
given xyd
a set of points in the xy-plane which
increasing abscissae and x
a set of abscissae, this
function computes y
the corresponding y-axis values by
linear interpolation.
x=[1 10 20 30 40]; y=[1 30 -10 20 40]; plot2d(x',y',[-3],"011"," ",[-10,-40,50,50]); yi=interpln([x;y],-4:45); plot2d((-4:45)',yi',[3],"000"); | ![]() | ![]() |