Attachment 11347 Details for Bug 24356 – Introduction to matrix handling.

Introduction to matrix handling.

tutorial.py (text/plain), 636 bytes, created by Len Lawrence on 2019-11-09 16:39:22 CET

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Creator: Len Lawrence

Created: 2019-11-09 16:39:22 CET

Size: 636 bytes

patch

obsolete

# A few matrix operations:
import numpy as np
a = np.arange( 15 ).reshape( 3, 5 )
print( a )
print( a.shape )
print( a.ndim )
print( a.dtype.name )
print( a.itemsize )
print( a.size )
print( type( a ) )
b = np.array( [6, 7, 8] )
print( b )
print( type( b ) )

c = np.array( [(1.5,2,3), (4,5,6)] )
print( c )

d = np.array( [ [1,2], [3,4] ], dtype=complex )
print( d )
# show the result of subtracting one array from another
a = np.array( [20,30,40,50] )
b = np.arange( 4 )
print( b )
c = a - b
print( c )
# square all the values in an array
print( b**2 )
sines = 10*np.sin( a )
print( sines )
print( a < 35 )

# And so on and so forth.

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Attachments on bug 24356: 11347