Differential wrt qDot(t)
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syms t_1(t)
f = sin(t_1) + cos(t_1)
diff(f, t) % Is Ok
diff(f, t_1) % should give us = cos(t_1)-sin(t_1), but we get error:
"Error using sym/diff Arguments, except for the first, must not be symbolic functions."
How should we calculate this in matlab?
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2018-4-11
2018-4-17
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