How to plot a derivative against variable?
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Use if statements to select an equation for x based on the inputed value for damping. Plot a graph of x (displacement) against time (this bit works). Then want to differentiate x for velocity, and differentiate velocity for acceleration and then plot all three. I used:
v = diff(x,1)
Get error "Data must be numeric, datetime, duration, categorical, or an array convertible to double."
x is a previously selected equation with t as a variable, also includes Z but this is asked for and inputted at the beginning.