data type not understood
Try: Since the shape parameter has to be an int or sequence of ints http://docs.scipy.org/doc/numpy/reference/generated/numpy.zeros.html Otherwise you are passing ncols to np.zeros as the dtype.
numpy
How do I read CSV data into a record array in NumPy?
ou can use Numpy’s genfromtxt() method to do so, by setting the delimiter kwarg to a comma.
Converting list to numpy array
If you have a list of lists, you only needed to use … per this LINK in the scipy / numpy documentation. You just needed to define dtype inside the call to asarray.
numpy matrix vector multiplication
Simplest solution Use numpy.dot or a.dot(b). See the documentation here. This occurs because numpy arrays are not matrices, and the standard operations *, +, -, / work element-wise on arrays. Note that while you can use numpy.matrix (as of early 2021) where * will be treated like standard matrix multiplication, numpy.matrix is deprecated and may … Read more
How does numpy.newaxis work and when to use it?
When I try the result gives me a 2-d plot frame with x-axis from 0 to 1. However, when I try using numpy.newaxis to slice a vector, Is it the same thing except that it changes a row vector to a column vector? Generally, what is the use of numpy.newaxis, and in which circumstances should … Read more
numpy division with RuntimeWarning: invalid value encountered in double_scalars
You can’t solve it. Simply answer1.sum()==0, and you can’t perform a division by zero. This happens because answer1 is the exponential of 2 very large, negative numbers, so that the result is rounded to zero. nan is returned in this case because of the division by zero. Now to solve your problem you could: go for a library for … Read more
Could not install packages due to a “Environment error :[error 13]: permission denied : ‘usr/local/bin/f2py'”
I am trying to install numpy on macOS X but after executing the command pip install numpy I am getting the error: Environment error :[error 13]: permission denied : ‘usr/local/bin/f2py How do I fix it?
How to fix IndexError: invalid index to scalar variable
You are trying to index into a scalar (non-iterable) value: When you call [y for y in test] you are iterating over the values already, so you get a single value in y. Your code is the same as trying to do the following: I’m not sure what you’re trying to get into your results … Read more
TypeError: unhashable type: ‘numpy.ndarray’
Your variable energies probably has the wrong shape: And that’s what happens if you read columnar data using your approach: Probably you can simply use instead. (P.S. Your code looks like it’s undecided about whether it’s data or elementdata. I’ve assumed it’s simply a typo.)
ValueError: Unknown label type: ‘continuous’
I’ve seen other posts talking about this but anyone of these can help me. I am using jupyter notebook with Python 3.6.0 on windows x6 machine. I have a large dataset but I keep only a piece of it to run my models: This is a piece of code that i used: When I run … Read more