Numpy, use numpy. NAN will a list of strings into a null value, can only get results na-CodePudding

Specific code as shown in figure
Could you tell me how to solve the

CodePudding user response:

Can't use None?

CodePudding user response:

I met the problem is, I'm free list of values, the print out is, 'rather than' nan ', '
In the process of put the list into matrix, 'is the string format, cannot be converted to floating point, not into matrix,
See article said the numpy nan is a float, so want to try to ' 'to' nan ', to float,
But with the cols [cols==']=np, NAN, is still empty value ', 'not' NAN ',
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CodePudding user response:

 

T_change=np. Arange (24). Reshape ((4, 6)) 
Less than 10 to 10 # principle, more than 18 replaced with 18, the rest remains the same 
T_change=t_change. Astype (float) 
T_change [3, 4, 5]]=np, NaN 
Print (t_change) 
T_result=t_change. Clip (10, 18) 
Print ('='* 30) 
Print (t_result)

CodePudding user response:

To convert your array to float type, and then assign a value