Python Forum

Could somebody please tell me why the variable 'collapse_steps' is not returned in the variable 'collapse_times'?

collapse_duration = 60.0 
collapse_steps = 2  # can be changed by USER
collapse_starttime = 0.0  # in second; can be changed by USER
collapse_times = np.linspace(0,collapse_duration,collapse_steps)
print(collapse_duration)
print(collapse_steps)
print(collapse_times)

Error:
60.0
2
[ 0. 60.]

What error? Do you think collapse_times should have 3 numbers? In linspace(0, collapse_duration, collapse_steps), 0 is the start value, collapse_duration the end value, and collapse steps the number of values in the returned samples array.

import numpy as np
for i in range(1, 6):
  print(i, np.linspace(0, 100, i))

Output:
1 [0.]
2 [  0. 100.]
3 [  0.  50. 100.]
4 [  0.          33.33333333  66.66666667 100.        ]
5 [  0.  25.  50.  75. 100.]

Or were you expecting linspace to return the step size. For that you need to set retstep to True.

import numpy as np
print(np.linspace(0, 100, 5, retstep=True))

Output:
(array([  0.,  25.,  50.,  75., 100.]), 25.0)

More information about numpy.linspace is here:

https://numpy.org/doc/stable/reference/g...space.html