Category: Scipy

How to upgrade SciPy on Fedora 23

As it was with Fedora 22, the Fedora 23 still ships with SciPy version 0.14.1. To upgrade SciPy please run the following commands as root:

dnf install python-pip
dnf install blas-devel
dnf install lapack-devel
dnf install gcc-c++
dnf groupinstall "Development Tools"

If you now try to upgrade scipy you will get the following error
g++: error: /usr/lib/rpm/redhat/redhat-hardened-cc1: No such file or directory

On Fedora 23 one has also to install rpm-build to avoid errors during compilation of scipy:
dnf search rpm-build

Finally uninstall scipy 0.14.1, download 0.16.0, compile it and install. All with the following command:
pip install --upgrade scipy

scipy.odr.odrpack.odr_error: number of observations do not match

When the length of t does not match the length of observations array,  it may couse this error

t = np.linspace(0.5, 54.5, 18)

P = [29.976, 193.96, 362.64, 454.78, 498.42, 517.14, 515.76, 496.38, 472.14, 432.81, 386.95, 352.93, 318.93, 279.47, 260.19, 230.92, 202.67, 180.3, 159.09, 137.31, 120.47, 104.51, 99.371, 89.606, 75.431, 67.137, 58.561, 55.721]

data = Data(t, P)

When the length of t and P are different, program ends with the error “scipy.odr.odrpack.odr_error: number of observations do not match”