Derivative of an Array

[belt_sander]

I have a body of data for position and time (constant time interval),
and I would like to take the derrivative in order to get the speed. Is
it possible to do this with MathCad?

[ptc-1368288]

On 5/6/2010 11:51:47 PM, belt_sander wrote:
>I have a body of data for
>position and time (constant
>time interval),
>and I would like to take the
>derrivative in order to get
>the speed. Is
>it possible to do this with
>MathCad?
_____________________________

No problem, fit first the data in order to get an analytically exploitable function, whether an approximation or a model. You can do it otherwise using the finite differences, but that won't filter/smooth the data.

jmG

[AlvaroDíaz]

For a few points data set, assumed as something like exact points without error, check in the "Quicksheets" under "Data Analysis" the entry "Differentiation and Integration of Data Vectors".

For disperse data with more or less error (a cloud of points) check, also under "Data Analysis", the related entries about fitting techniques like linfit, power fit, etc.

Regards. Alvaro.