ValueError: could not convert string to float, (numpy.string_)

Question

I am trying to convert an array of np.string_s that are all representing numbers into floats for mathematical use. I am reading data from a fits file using pyfits.

data = read_fits(datafile)
glon = np.asarray(data['GLON'], dtype = float); glat = data['GLAT']
# heliocentric distance in kpc
D = data['D'] 
for i in range(len(glon)):
    #glon[i] = (glon[i]).astype(float)

I have left a couple of my attempts to change the type, but float() and all similar operations I have heard of are failing. Yet I do not think I have a bogus value as I have looked through a print of the data after reading and it is all numerical.

What is the value inside data['GLON']? What errors are you getting when you say "failing"? — Aditya
– Aditya, Commented Jun 24, 2015 at 18:20
The error is ValueError: could not convert string to float if I attempt to convert in any way. It is unsupported operand type(s) for /: 'numpy.string_' and 'int' for my other purposes. — Helicity
– Helicity, Commented Jun 24, 2015 at 18:52
What's the dtype of data['GLON']. I'm guessing np.string_. Also you could experiment with [float(i) for i in data['GLON]]` (assuming it is 1d). — hpaulj
– hpaulj, Commented Jun 24, 2015 at 19:21

Helicity · Accepted Answer · 2015-06-24 19:16:08Z

1

Row [0] had blank characters...

answered Jun 24, 2015 at 19:16

Helicity

1271 gold badge1 silver badge7 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

hpaulj Over a year ago

I thought it was ok to answer your own question. In fact as a reader I prefer it that way. I tend to focus on questions without an answer, and often skip ones with an accepted one.

Collectives™ on Stack Overflow

ValueError: could not convert string to float, (numpy.string_)

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related