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

</paste from shell>

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//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//issues/1
.

—
Reply to this email directly or view it on GitHub
#1 (comment).