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Sigmun
Sigmun
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I am looking for an easy way to modify one field of a numpy structured array of a selected line of it. Here is my SWE :

import numpy as np
dt=np.dtype([('name',np.unicode,80),('x',np.float),('y',np.float)])
a=np.array( [('a',0.,0.),('b',0.,0.),('c',0.,0.) ],dtype=dt)
b=a.copy()
a[a['name']=='a']['x']=tuple(1)a[a['name']=='a']['x']=1
print a==b # return [ True  True  True]

In this example, the a==b results should return [False True True].Actually, I would like to selected the line of my array from the 'name' field and modify the value of one field of it (here 'x').

I am looking for an easy way to modify one field of a numpy structured array of a selected line of it. Here is my SWE :

import numpy as np
dt=np.dtype([('name',np.unicode,80),('x',np.float),('y',np.float)])
a=np.array( [('a',0.,0.),('b',0.,0.),('c',0.,0.) ],dtype=dt)
b=a.copy()
a[a['name']=='a']['x']=tuple(1)
print a==b # return [ True  True  True]

In this example, the a==b results should return [False True True].Actually, I would like to selected the line of my array from the 'name' field and modify the value of one field of it (here 'x').

I am looking for an easy way to modify one field of a numpy structured array of a selected line of it. Here is my SWE :

import numpy as np
dt=np.dtype([('name',np.unicode,80),('x',np.float),('y',np.float)])
a=np.array( [('a',0.,0.),('b',0.,0.),('c',0.,0.) ],dtype=dt)
b=a.copy()
a[a['name']=='a']['x']=1
print a==b # return [ True  True  True]

In this example, the a==b results should return [False True True].Actually, I would like to selected the line of my array from the 'name' field and modify the value of one field of it (here 'x').

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Sigmun
Sigmun
  • 1k
  • 2
  • 12
  • 25

How to modify one column of a selected row from a numpy structured array

I am looking for an easy way to modify one field of a numpy structured array of a selected line of it. Here is my SWE :

import numpy as np
dt=np.dtype([('name',np.unicode,80),('x',np.float),('y',np.float)])
a=np.array( [('a',0.,0.),('b',0.,0.),('c',0.,0.) ],dtype=dt)
b=a.copy()
a[a['name']=='a']['x']=tuple(1)
print a==b # return [ True  True  True]

In this example, the a==b results should return [False True True].Actually, I would like to selected the line of my array from the 'name' field and modify the value of one field of it (here 'x').