Revision history [back]
 | 1 | initial version |
In Python, you can read a string from the user prompt with the function raw_input:
sage: a = raw_input()
2*x+3
sage: a
'2*x+3'
sage: type(a)
<type 'str'>
Then you can transform that string into a symbolic expression:
sage: b = SR(a)
sage: b
2*x + 3
sage: type(b)
<type 'sage.symbolic.expression.Expression'>
sage: sin(b)
sin(2*x + 3)
If you want to make something fancy, with input boxes and sliders, you can have a look at Sage interact.
| | 2 | No.2 Revision |
In Python, you can read a string from the user prompt with the function raw_input:
sage: a = raw_input()
2*x+3
sage: a
'2*x+3'
sage: type(a)
<type 'str'>
Then you can transform that string into a symbolic expression:
sage: b = SR(a)
sage: b
2*x + 3
sage: type(b)
<type 'sage.symbolic.expression.Expression'>
sage: sin(b)
sin(2*x + 3)
You can put it within a function:
sage: def user_square():
....: print 'Please enter a function to be squared: ',
....: a = raw_input()
....: return SR(a)^2
sage: user_square()
Please enter a function to be squared: cos(d)+sin(t)
(cos(d) + sin(t))^2
If you want to make something fancy, with input boxes and sliders, you can have a look at Sage interact.
