<< gcd

Special functions

peaks >>

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interp1

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Linear 1-D data interpolation

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Syntax

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vq = interp1(x, v, xq)

vq = interp1(x, v, xq, 'linear')

vq = interp1(v, xq)

vq = interp1(v, xq, 'linear')

Input argument

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x

Sample points: vector.

v

Sample values: vector, matrix.

xq

Query points: scalar, vector, matrix.

Output argument

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vq

Interpolated values: scalar, vector, matrix.

Description

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vq = interp1(x, v, xq) returns interpolated values of a 1-D function at specific query points using linear interpolation.

Bibliography

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de Boor, C., A Practical Guide to Splines, Springer-Verlag, 1978.

Example

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f = figure();
v = [0  1.41  2  1.41  0  -1.41  -2  -1.41 0];
xq = 1.5:8.5;
vq = interp1(v,xq);
plot(1:9, v, 'o', xq, vq, '*');
legend('v','vq');

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET