Matplotlib Tutorial 7 - loading data from files

Many times, people want to graph data from a file. There are many types of files, and many ways you may extract data from a file to graph it. Here, we'll show a couple of ways one might do this. First, we'll use the built-in csv module to load CSV files, then we'll show how to utilize NumPy, which is a third-party module, to load files.

[awesomeregularnormalguy]

Awesome lecture! Using this plots are boosting every work ive done in terms of quality. Thank you!

[esrabasaran]

again and again... thank you thank you thank you for 100 times for your amazing lessons

[MistahBushido]

The content on this channel is first rate, and I recommend it to everyone.

[adithya]

Hi,

I was wondering why we need to use the csv package in general, if we can do the exact same thing in Pandas ?

[NickFarrow]

This is great just wish it had date and time for x. Keep them coming :)

[kunns]

What if I want to plot only specific parts of the data?
eg - The 2nd and 5th entry in the text file?
or even like Last 3 entries of the file?

[tzahigeller]

thanks for the tutorial, how do I specify more than one delimiter such as comma and space?
Thanks

[ralphcastro]

Thanks again for your whole channel you have helped me a lot in finding my way through python. I will thank you if you can also do a a video in which you talk about Loading data from Binary data set files, thanks.

[abhinandanbatra]

Hey thank you for these videos, they are really helpful. I have a question. I want to open multiple 3D image files using matplot as a subplot in the main plot. The files are in the same directory but inside the directory, there are separate folders with two files in each folder. Also, I want to analyze these files. I would appreciate your help.

[floppydisk]

Hi, is there a difference in execution times between the "numpy method" and the "csvfile method"? Reason I'm asking is that I will be reading data from sensors, which will be updating a text file anywhere between 8hz to 100hz, depending on equipment used... Which method would you suggest using in such a case? Thank you in advance.

[mohammedsahique]

Thank you very much for this tutorial, helped a lot. Can this be used for a 3d plot where i have 3 lists x, y and z, whose data is read from a file...

[lillyclive]

I was just wondering if there is an excel file as a csv and different numbers in each row what would the delimeter be?

[mrcrash]

How can you load strings in the x axis instead of integers?

[abenderbey]

I know very little English, but I understand your lessons. Thank you!

[darealtuck]

It doesn't give me any error but always gives a blank result. I thought that it's not recognizing my .txt file so I specified the exact location (C:\users\whatever) and the plot still comes up blank with both methods.

[issrahassoun]

hiiii, if i have many data in the same file and i want to do matplotlip for 2 data in the same figure how i can do that?
thxx

[finan]

First things first, thank you for this great series. It's very useful. Bur I ask myself honestly, what is the best way to read in and store data from multiple csv files in order to do further processing?

[Letseducateyou]

hey,

Q1. what if i'm using an excel file ? what will the delimiter be ? should it even be there ?

Q2. i have time and its corresponding voltage in consecutive columns. how do i array it in a variable and if i put the time which is in (hh:mm:ss) format will the plot happen ?

+sentdex

[alexanderin]

How to specify white space ( single space or tab space) as delimiter?

[raviraivat]

Hey quick question, if my text file had one x axis list, but multiple y axis lists, how would you modify the numpy code (if you need to at all?). would you just have to define y1, y2, y3, y4, y5?