Unable to take Derivative

[HassanIqbal]

Hi All, 

I am trying to take derivative of the graph which is attached with this message. Actually I am unable to do it. Any help would be much appreciated. Plotting the data according to requirements is fine but derivative. 

Regards

Hassan 

[altenbach]

After bundling, you have a cluster of an x and a y array. What makes you think you can successfully convert that structure to a dynamic data signal?

We cannot really debug pictures, but it seems that your x-values are spaced equally. No need for an xy graph and no need for complicate data structures, dynamic data, and express VIs. You can operate on plain 1D arrays for Y and just remember x0,dx when needed (e.g. for the x-axis scaling, and differentiation dx, etc.).