Add "download eigenvalues/eigenvectors" button on the web app

[moorepants]

The eigenvalue plot has data for multiple lines plotted against the independent variable (speed). There are four eigenvalues and each have real and imaginary parts. So you want to be able to download the plotted data in to a CSV file that looks like:

speed,eval1_real,eval2_real,eval3_real,eval4_real,eval1_imag,eval2_imag,eval3_imag,eval4_imag
3.0,x.xxx,x.xxx,x.xxx,x.xxx,x.xxx,x.xxx,x.xxx,x.xxx,x.xxx,x.xxx

The x.xxx should be values printed to 14 decimal places using '{:1.14f}'.format(eval1_real).

This function calculates the eigenvalues: https://github.com/moorepants/BicycleParameters/blob/master/bicycleparameters/main.py#L853

[moorepants]

@rrryy39 Does this help?

[moorepants]

@rrryy39 You will need to understand how to use the Bicycle object, see https://pythonhosted.org/BicycleParameters/examples.html

[moorepants]

From @rrryy39:

I tried this line of code and it gives me this error:


I tried with different parameters and it always gives this error, what is the best way to calculate eigenvalues? thank you very much

[moorepants]

The error message indicates that the directory where your data files are cannot be found, thus it returns bicycle = None. Make sure to use the same value pathToData is set to already in the app.

[rrryy39]

I tried using ./bicycles/Benchmark/*RawData*/BenchmarkBenchmark,txt as well and it seems cannot find the file as well.

…

On Tue, Dec 8, 2020 at 12:25 AM Jason K. Moore ***@***.***> wrote: The error message indicates that the directory where your data files are cannot be found, thus it returns bicycle = None. Make sure to use the same value pathToData is set to already in the app. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#67 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ARFWQYI4VTOQZC34JXUCRM3STXPHFANCNFSM4OPIKYVQ> .

[moorepants]

You don't seem to be using the path that is defined in the app, which is here: https://github.com/moorepants/BicycleParameters/blob/master/bicycleparameters/cycle_app.py#L21

[moorepants]

Are you trying this in the app or just a stand alone test to calculate the eigenvalues?

[rrryy39]

Stand along to calculate the eigenvalues

…

On Tue, Dec 8, 2020 at 12:51 AM Jason K. Moore ***@***.***> wrote: Are you trying this in the app or just a stand alone test to calculate the eigenvalues? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#67 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ARFWQYOYDZLRYUYJV56O7KDSTXSKTANCNFSM4OPIKYVQ> .

[moorepants]

1. You need a directory with the data, one such directory is included in the git repo.
2. You need to specify the path to that directory correctly. The path you have is not correct. Maybe use the full absolute path.