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I have created a array by generating a group of random numbers and converted them into int type. However, i do not think my way below is efficient. Is there a best way to change the data type in a array?
# standard normal distributed random numbers
c=random.randn(5,5)
c
array([[-0.37644781, -0.81347483, -0.36895952, -2.68702544, -0.96780752],
[ 0.05293328, 1.65260753, 0.55586611, -0.5786392 , 0.50865003],
[ 1.25508358, 0.51783276, 2.36435212, -0.23484705, -1.20999296],
[ 2.07552172, 0.65506648, 0.10231436, -0.26046045, 0.40148111],
[ 0.24864496, -1.8852587 , -2.51091886, 1.01106003, 1.53118353]])
d=array([[-0.37644781, -0.81347483, -0.36895952, -2.68702544, -0.96780752],
[ 0.05293328, 1.65260753, 0.55586611, -0.5786392 , 0.50865003],
[ 1.25508358, 0.51783276, 2.36435212, -0.23484705, -1.20999296],
[ 2.07552172, 0.65506648, 0.10231436, -0.26046045, 0.40148111],
[ 0.24864496, -1.8852587 , -2.51091886, 1.01106003, 1.53118353]],dtype=int)
d
array([[ 0, 0, 0, -2, 0],
[ 0, 1, 0, 0, 0],
[ 1, 0, 2, 0, -1],
[ 2, 0, 0, 0, 0],
[ 0, -1, -2, 1, 1]])
758
asked Apr 24 '15 10:04
Converting Data Type on Existing Arrays The best way to change the data type of an existing array, is to make a copy of the array with the astype() method.
You can create an array with elements of different data types when declare the array as Object. Since System. Object is the base class of all other types, an item in an array of Objects can have a reference to any other type of object.
Python's array module provides space-efficient storage of basic C-style data types like bytes, 32-bit integers, floating point numbers, and so on. Arrays created with the array. array class are mutable and behave similarly to lists—except they are “typed arrays” constrained to a single data type.
Reshape. There are different ways to change the dimension of an array. Reshape function is commonly used to modify the shape and thus the dimension of an array.
Either you find a way to get the output with the correct type or you use astype, see the docs, in order to change the type of an array
In your case the following example gives you an array of type np.int
c=random.randn(5,5).astype(np.int)
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