how to find the local Slope of a curve in each point

27 次查看（过去 30 天）

Dimitrios 2014-9-24

编辑： Dimitrios 2014-9-24

how to calculate the local slope degree of this curve in its point having the x and y values of the curve:

I tried to do it with the following :

slope = diff(y) ./ diff(x);

or :

slopeY = (y(2:end) + y(1:end-1))/2;

but my results doesnt seem to be correct. Thank you.

Adam 2014-9-24

In what way do the results not seem correct? Do you have manually calculated results that differ?

Star Strider 2014-9-24

I would use gradient rather than diff, since the output vector is the same length as the input vector.

the cyclist 2014-9-24

One possibility is to use the movingslope function from the File Exchange.

在 Help Center 和 File Exchange 中查找有关 Interpolation 的更多信息

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by