number_line_example.py fails ootb

[jwalterlarson]

Hi...

First of all, thank you for creating this code and making it publicly available! The output looks lovely, and I think you're filling an important niche in the matplotlib ecosystem.

I did a read-only clone of your source from github and tried running the example code out of the box (ootb). Sadly, it failed with this error message:

larson@calhoun:Matplotlib1D-plot>python number_line_example.py Traceback (most recent call last): File "number_line_example.py", line 9, in numline.graph(e) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 96, in graph toGraph = self.solve(eq,toGraph) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 148, in solve toGraph.append([self.getAfter(eq,'>') , self.ceil]) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 167, in getAfter raise Exception("Error parsing equations. Make sure they are of the format x>1 where x is any variable and 1 is any number") Exception: Error parsing equations. Make sure they are of the format x>1 where x is any variable and 1 is any number I didn't modify anything in your distribution. I'm using python 2.7.4. Any advice, help you can offer in addressing this mysterious message is greatly appreciated. Thanks and all the best... Jay P.S.: I should explain why I downloaded your code. My primary reason was work-related--I want to plot 1-D _sets_ of points rather than intervals (to visualize some work I'm doing with 1-D meshes and multigrid techniques), and had been hoping I could modify your code simply to plot sets of individual points. The second reason of course is that I have a 12-year-old son who doesn't share my love of mathematics, but he is pretty keen on python programming.

[amauboussin]

Glad you are interested! Thanks for pointing out that bug - I added a little snippet of code that would allow the graph function to take either a string or a list of strings right before my last commit and forgot to test it. I pushed a new version with a fix so everything should be alright out of the box now.

I also added a new function, plot_points, that takes a list of numbers as input and bypasses the equation parsing code. Example usage is at the end of number_line_example.py. Hopefully this is helpful. Feel free to let me know if you any other questions about the code. I have a lot of free time over the next week since I am in between the school year and my summer internship.

-Andrew

On Thu, May 23, 2013 at 6:58 PM, J. Walter Larson notifications@github.comwrote:

Hi...

First of all, thank you for creating this code and making it publicly available! The output looks lovely, and I think you're filling an important niche in the matplotlib ecosystem.

I did a read-only clone of your source from github and tried running the example code out of the box (ootb). Sadly, it failed with this error message:

larson@calhoun:Matplotlib1D-plot>python number_line_example.py Traceback (most recent call last): File "number_line_example.py", line 9, in numline.graph(e) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 96, in graph toGraph = self.solve(eq,toGraph) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 148, in solve toGraph.append([self.getAfter(eq,'>') , self.ceil]) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 167, in getAfter raise Exception("Error parsing equations. Make sure they are of the format x>1 where x is any variable and 1 is any number") Exception: Error parsing equations. Make sure they are of the format x>1 where x is any variable and 1 is any number

I didn't modify anything in your distribution. I'm using python 2.7.4.

Any advice, help you can offer in addressing this mysterious message is greatly appreciated.

Thanks and all the best...

Jay

P.S.: I should explain why I downloaded your code. My primary reason was work-related--I want to plot 1-D sets of points rather than intervals (to visualize some work I'm doing with 1-D meshes and multigrid techniques), and had been hoping I could modify your code simply to plot sets of individual points. The second reason of course is that I have a 12-year-old son who doesn't share my love of mathematics, but he is pretty keen on python programming.

— Reply to this email directly or view it on GitHubhttps://github.com/amauboussin/Matplotlib1D-plot/issues/1 .

[jwalterlarson]

Hi Andrew,

Thank you so much for your rapid response!

On 5/24/13 10:26 AM, Andrew Mauboussin wrote:

Glad you are interested! Thanks for pointing out that bug - I added a little snippet of code that would allow the graph function to take either a string or a list of strings right before my last commit and forgot to test it. I pushed a new version with a fix so everything should be alright out of the box now. Thanks--I'll give this a try. At present I'm playing with your previous source to do a simple hack to plot points, but points whose sizes/colours are governed by some other variable. Basically, I'm doing this because my day job is working with a mathematical construct called "sparse grids." I'm developing grid software to support that kind of research, but wanted to build a little test code for one- dimensional sets. In short, I'm shooting for making 1-D point plots that are like the kind of sparse grid pictures shown if you do a google images search on sparse grids.

I also added a new function, plot_points, that takes a list of numbers as input and bypasses the equation parsing code. Example usage is at the end of number_line_example.py. Hopefully this is helpful. Feel free to let me know if you any other questions about the code. I have a lot of free time over the next week since I am in between the school year and my summer internship. Excellent! I will also try this out. You'll no doubt be hearing from me...

Thanks and all the best...

Jay

-Andrew

On Thu, May 23, 2013 at 6:58 PM, J. Walter Larson notifications@github.comwrote:

Hi...

First of all, thank you for creating this code and making it publicly available! The output looks lovely, and I think you're filling an important niche in the matplotlib ecosystem.

I did a read-only clone of your source from github and tried running the example code out of the box (ootb). Sadly, it failed with this error message:

larson@calhoun:Matplotlib1D-plot>python number_line_example.py Traceback (most recent call last): File "number_line_example.py", line 9, in numline.graph(e) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 96, in graph toGraph = self.solve(eq,toGraph) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 148, in solve toGraph.append([self.getAfter(eq,'>') , self.ceil]) File "/Users/larson/Scratch/NumberLine/Matplotlib1D-plot/number_line.py", line 167, in getAfter raise Exception("Error parsing equations. Make sure they are of the format x>1 where x is any variable and 1 is any number") Exception: Error parsing equations. Make sure they are of the format x>1 where x is any variable and 1 is any number

I didn't modify anything in your distribution. I'm using python 2.7.4.

Any advice, help you can offer in addressing this mysterious message is greatly appreciated.

Thanks and all the best...

Jay

P.S.: I should explain why I downloaded your code. My primary reason was work-related--I want to plot 1-D sets of points rather than intervals (to visualize some work I'm doing with 1-D meshes and multigrid techniques), and had been hoping I could modify your code simply to plot sets of individual points. The second reason of course is that I have a 12-year-old son who doesn't share my love of mathematics, but he is pretty keen on python programming.

— Reply to this email directly or view it on GitHubhttps://github.com/amauboussin/Matplotlib1D-plot/issues/1 .

— Reply to this email directly or view it on GitHub https://github.com/amauboussin/Matplotlib1D-plot/issues/1#issuecomment-18380180.