numpy将不同类型的数组保存到文本文件中 [英] numpy save an array of different types to a text file
问题描述
>>> a = numpy.array((1,2.0,'buckle_my_shoe'),dtype =('i4,f8,a14'))
array((1,2.0,'buckle_my_shoe'),
dtype = ('f0','< i4'),('f1','< f8'),('f2','S14')])
,我希望将其保存到文本文件中的单个空格或制表符分隔的行。如果数组都是相同的类型,我可以使用 numpy.savetxt('myfile.dat,myarray,newline =)
。但是,这似乎不像混合数据类型/结构化数组,例如:
pre $ file $('myfile.dat',' a')
numpy.savetxt('myfile.dat',a,newline =)
IndexError:元组索引超出范围
任何人都可以推荐一个这样做的方法吗?
编辑:出于任何原因,我似乎无法单独离开这个答案,所以这里是一个更清洁的版本,不使用 csv $ c $不必要的模块。为了记录,@ askewchan的答案还是比较好的!
a = numpy.array([(1,2.0,'buckle_my_shoe' ),
(3,4.0,'lock_the_door')],dtype =('i4,f8,a14'))
with open('test.txt','w')as f:
f.write('.join([str(item)for sublist in for item in sublist]))
print open('test.txt','r')。read()
输出:
1 2.0 buckle_my_shoe 3 4.0 lock_the_door
Say I have the following numpy structured array:
>>> a = numpy.array((1, 2.0, 'buckle_my_shoe'),dtype=('i4,f8,a14'))
array((1, 2.0, 'buckle_my_shoe'),
dtype=[('f0', '<i4'), ('f1', '<f8'), ('f2', 'S14')])
and I want to save it to a single space or tab delimited row in a text file. If the array were all of the same type I could use numpy.savetxt('myfile.dat,myarray,newline=" ")
. However, this seems to not like mixed data types/structured arrays, for example:
file('myfile.dat', 'a')
numpy.savetxt('myfile.dat',a,newline=" ")
gives this error:
IndexError: tuple index out of range
Can anyone recommend a way of doing this?
Edit: For whatever reason I can't seem to be able to leave this answer alone, so here's a cleaner version that doesn't use the csv
module unnecessarily. For the record, @askewchan's answer is still better!
a = numpy.array([(1, 2.0, 'buckle_my_shoe'),
(3,4.0,'lock_the_door')],dtype=('i4,f8,a14'))
with open('test.txt','w') as f:
f.write(' '.join([str(item) for sublist in a for item in sublist]))
print open('test.txt','r').read()
Output:
1 2.0 buckle_my_shoe 3 4.0 lock_the_door
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