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+--- Thread: Integration in Python (/thread-16898.html)
Integration in Python - robmio - 05-08-2021 04:07 PM
Hello, how can i insert an integral in python? For example:
Code:
#PYTHON EXPORT integrale
import sys
from hpprime import *
from math import *
xx=float(sys.argv[0])
yy=float(sys.argv[1])
gg=∫(x,x,xx,yy)
print(gg)
eval("wait(0)")
#end
EXPORT Prove(a,b)
BEGIN
PYTHON(integrale,a,b);
END;RE: Integration in Python - robmio - 05-08-2021 04:45 PM
In reality, the calculation of the integral, with extremes equal to "xx = 0" and "yy = 3", instead of being equal to 9/2, becomes equal to "yy^2/2 - xx^2/2". How can I express, in the integral, the values given to "xx" and "yy"?
Code:
#PYTHON EXPORT integrale
import sys
from hpprime import *
from cas import *
xx=sys.argv[0]
yy=sys.argv[1]
xx=float(xx)
yy=float(yy)
gg=caseval("int(x,x,xx,yy)")
print(gg)
#end
EXPORT Prova(a,b)
BEGIN
PYTHON(integrale,a,b);
END;RE: Integration in Python - Albert Chan - 05-08-2021 05:34 PM
(05-08-2021 04:45 PM)robmio Wrote: gg=caseval("int(x,x,xx,yy)")
You need to interpolate the string
>>> xx, yy = "0", "3"
>>> "int(x, x, {0}, {1})".format(xx,yy)
'int(x, x, 0, 3)'
RE: Integration in Python - robmio - 05-08-2021 07:16 PM
it works! Thanks so much! Another question: the result appears in the "Terminal" screen: how can I get the result in the "CAS" screen?
RE: Integration in Python - robmio - 05-08-2021 07:42 PM
Also, why is it an error if I set the extremes "xx = 0" and "yy = 1000"? In fact, if I set the upper extreme to "999", the result is right.