当我这样做时
k=12
rsf = np.zeros((int(k), 9), dtype='object')
for i in range(0, int(k)):
rsf[i, 0] = "FREQ"
for j in range(1, 9):
rsf[i, j] = sampled[8*i+j-1, 0]
然后尝试按
编写np.savetxt('test.txt', rsf, delimiter=',')
我得到错误数组dtype(' object')和格式说明符
之间不匹配有关如何克服此问题的任何帮助? (并且可能附加到不相等大小的数组?)
答案 0 :(得分:8)
更多错误消息:
-> 1162 % (str(X.dtype), format))
1163 if len(footer) > 0:
1164 footer = footer.replace('\n', '\n' + comments)
TypeError: Mismatch between array dtype ('object') and format specifier ('%.18e,%.18e,%.18e,%.18e,%.18e,%.18e,%.18e,%.18e,%.18e')
savetxt
正在遍历rsf
行,并且每次尝试创建一个可以写入文件的字符串。如果没有fmt
规范,它会尝试按列数重复的默认格式。这是format specifier
。
这是一个基本的Python字符串格式问题。
In [264]: row=rsf[1,:]
In [265]: row
Out[265]: array(['FREQ', 8, 9, 10, 11, 12, 13, 14, 15], dtype=object)
In [266]: '%s, %d, %d, %d, %d, %d, %d, %d, %d'%tuple(row)
Out[266]: 'FREQ, 8, 9, 10, 11, 12, 13, 14, 15'
因此您需要使用以下内容调用savetxt
:
In [267]: fmt='%s, %d, %d, %d, %d, %d, %d, %d, %d'
In [268]: np.savetxt('test.txt',rsf,fmt=fmt)
In [269]: cat test.txt
FREQ, 0, 1, 2, 3, 4, 5, 6, 7
FREQ, 8, 9, 10, 11, 12, 13, 14, 15
FREQ, 16, 17, 18, 19, 20, 21, 22, 23
FREQ, 24, 25, 26, 27, 28, 29, 30, 31
...
或者您可以使用通用'%s'
简化格式In [270]: np.savetxt('test.txt',rsf,fmt='%5s',delimiter=',')
In [271]: cat test.txt
FREQ, 0, 1, 2, 3, 4, 5, 6, 7
FREQ, 8, 9, 10, 11, 12, 13, 14, 15
FREQ, 16, 17, 18, 19, 20, 21, 22, 23
FREQ, 24, 25, 26, 27, 28, 29, 30, 31
FREQ, 32, 33, 34, 35, 36, 37, 38, 39