How to plot time-space diagram?

i have an excel file with the following type of data with the time and speed. i need the code matlab to plot graphs of time -space diagram, like this figure

.

Thanks

[Adam]

That doesn't seem like a 2d problem if you just have speed changing with time, then the distance is a 1d function of these is it not?

[SONIA mRAD]

thank you for your reply, yes i have juste this data

[Moritz Gerster]

Anyone? I need this plot function too! It's plt.imshow in matplotlib python.