Yes, given an array, array, and a value, item to search for, you can use np.where as: The result is a tuple with first all the row indices, then all the column indices. For example, if an array is two dimensions and it contained your item at two locations then would be equal to your item and so would be:
The gradient is computed using central differences in the interior and first differences at the boundaries. and The default distance is 1 This means that in the interior it is computed as where h = 1.0 and at the boundaries
What is the most efficient way to map a function over a numpy array? The way I’ve been doing it in my current project is as follows: However, this seems like it is probably very inefficient, since I am using a list comprehension to construct the new array as a Python list before converting it … Read more
Because we have two NumPy installations in the system. One is installed by Homebrew and the second is installed by pip. So in order to solve the problem, we need to delete one and use the default NumPy install by OpenCV. Check the path, and manually delete it using rm.
Try print with parenthesis in Python3 i.e. print(x) instead of print x
There are several tools for converting Matlab to Python code. The only one that’s seen recent activity (last commit from June 2018) is Small Matlab to Python compiler (also developed here: SMOP@chiselapp). Other options include: LiberMate: translate from Matlab to Python and SciPy (Requires Python 2, last update 4 years ago). OMPC: Matlab to Python (a bit outdated). Mat2py: Matlab … Read more
It means: Source. The first character specifies the kind of data and the remaining characters specify the number of bytes per item, except for Unicode, where it is interpreted as the number of characters. The item size must correspond to an existing type, or an error will be raised. The supported kinds are to an … Read more
This should work: In the above case where_are_NaNs is:
Your screenshot shows you doing a pip install from the python terminal which is wrong. Do that outside the python terminal. Also the package I believe you want is: Since you’re running on Windows, I might look at the official install manual: https://breakthrough.github.io/Installing-OpenCV opencv2 is ONLY compatible with Python3 if you do so by compiling the source code. … Read more
In the solution below I used python3.4 as binary, but it’s safe to use with any version or binary of python. it works fine on windows too (except the downloading pip with wget obviously but just save the file locally and run it with python). This is great if you have multiple versions of python installed, so you can … Read more