Debashish Saha wrote: > from pylab import * > x=linspace(1,1000,10000) > a,b = 10,20 > def v(x): > i=5;v0=2 > for n in range(1,1+i): > if x>(n-1)*(a+b) and x<a+(n-1)*(a+b): > return 0 > elif x>a+(n-1)*(a+b) and x<(n)*(a+b) : > return v0 > #v=vectorize(v) > plot(x,v) > show() > > Error: > x and y must have same first dimension > Question: > what is to be edited?
When you want to plot a graph you can't pass the function as an argument. import pylab def f(x): return x*x x = [1, 2, 3] #wrong, one list and a function pylab.plot(x, f) # error pylab.show() You must instead pass the values, one list with the x-values and another with the same number of y-values: import pylab def f(x): return x*x x = [1, 2, 3] y = [f(xi) for xi in x] #correct, two lists pylab.plot(x, y) pylab.show() _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
