Jupyter notebook displaying simple, single line plot with multiple and colored line ones.

I'm doing a timeseries analysis report, so i'm moving over my Matlab code to Jupyter. However the plots in matlab, which appear fine and correct, do not do so on jupyter. Here's an example:

This is the plot how it should be taken directly from Matlab.

And this is the same graph, using the same code from jupyter notebooks.

[André Flakke]

Python uses C-style arrays by default, but Matlab uses Fortran-style arrays by default. It looks like you calulated the numbers with a transpose somewhere where it should not be.

[Walter Roberson]

I would not say so. The shape is right. But there are 10 lines of the same approximate shape where only one was expected.

It looks to me as if the equivalent to "hold on" is in effect.

[André Flakke]

Looks like you have plotted the columns or rows of a matrix in the same plot as a function of the dimension of those rows or columns. I could be wrong, but were you trying to plot the average of several measurements, stored in a matrix, in your jupyter notebook code?