Doubt in reshaping

#1

How does reshaping a numpy array to .reshape(-1, ) help? I mean what does it do? And if shape iss wriiten as (399,1) and (399, ) , what’s the difference?

#2

3339 ,1 represents an array with rows 3339 and one column whereas (3339,)reresents a vector.

#3

suppose u have an array of 500X2 if u reshape it as a.reshape((1000,-1)) it will automatically calculate what number of columns will be required to represent above data for above case -1 will be replaced by 1.

#4

What does -1 signify?

#5

-1 is like telling computer to calculate the value itself instead of giving it the value.

1 Like
#6

Thanks, this really helped :slight_smile:

#7

what’s difference between (399,1) array and (399, ) vector?

#8

nothing its just terminology