Symbolic differentiation with a plot
Code: "symb_diff2.m"
Programming language: Octave
DMelt Version 1. Last modified: 12/08/2016. License: Free
http://jwork.org/dmelt/code/cache/symb_diff2_7057.m
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# This uses Octave language

syms x % symbolic x
y=diff(x*cos(x),x) %  differentiate x*cos(x)
plot2d('minx=0;maxx=10;miny=-1;maxy=10')  % make canvas
draw2d(y) % plot the result