From: Ryan K. <kra...@gv...> - 2019-08-30 22:21:31
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Good times. I have updated to 10.14.6. I have 39GB of free hard drive space. But apparently this isn't enough to install xcode.............. -- Dr. Ryan Krauss Associate Professor Product Design and Manufacturing Engineering Grand Valley State University On Fri, Aug 30, 2019 at 11:27 AM Ryan Krauss <kra...@gv...> wrote: > I guess I have to upgrade to OSX 10.14 to get xcode back...... > > This could take a minute..... > > -- > Dr. Ryan Krauss > Associate Professor > Product Design and Manufacturing Engineering > Grand Valley State University > > > On Fri, Aug 30, 2019 at 11:26 AM Ryan Krauss <kra...@gv...> wrote: > >> I just ran a pip upgrade for the control module. I am running 0.8.2. >> >> I just tried upgrading slycot via pip. pip says I am currently running >> 0.3.0. I tried to upgrade to 0.3.5 via pip, but I receive error messages >> about gfortran and xcode. I am kind of surprised that I don't have them >> both working. I will work on that. >> >> I am getting False for this variable: slycot.__SLYCOT_SETUP__ >> >> -- >> Dr. Ryan Krauss >> Associate Professor >> Product Design and Manufacturing Engineering >> Grand Valley State University >> >> >> On Fri, Aug 30, 2019 at 2:16 AM Murray, Richard M. < >> mu...@cd...> wrote: >> >>> Which version of python-control and slycot? I just ran against the >>> latest master and slycot 0.3.4 and it didn’t generate an error. >>> >>> -richard >>> >>> > On 29 Aug 2019, at 11:04 , Ryan Krauss <kra...@gv...> wrote: >>> > >>> > I am trying to do a super basic step response for a first order TF and >>> am getting an error I have never seen before. The notebook is attached, >>> but here is the code and the error message: >>> > >>> > %matplotlib inline >>> > import matplotlib.pyplot as plt >>> > import numpy as np >>> > import control >>> > from numpy import sin, cos, tan, pi >>> > from control import TransferFunction as TF >>> > >>> > p = 30 >>> > >>> > G = control.TransferFunction(p,[1,p]) >>> > G >>> > >>> > control.step_response(G) >>> > >>> > >>> --------------------------------------------------------------------------- >>> > ValueError >>> > Traceback (most recent call last) >>> > >>> > <ipython-input-7-7235fbf92fdd> in <module>() >>> > ----> 1 control.step_response(G) >>> > >>> > >>> > >>> > /usr/local/lib/python3.6/site-packages/control/timeresp.py in >>> step_response(sys, T, X0, input, output, transpose, return_x) >>> > 450 >>> T, yout = step_response(sys, T, X0) >>> > 451 >>> > """ >>> > >>> > --> 452 sys = _get_ss_simo(sys, input, output) >>> > 453 if T is None: >>> > 454 if isctime(sys): >>> > >>> > >>> > >>> > /usr/local/lib/python3.6/site-packages/control/timeresp.py in >>> _get_ss_simo(sys, input, output) >>> > 378 If input is not specified, select first input and >>> > issue warning >>> > >>> > 379 >>> > """ >>> > >>> > --> 380 sys_ss = _convertToStateSpace(sys) >>> > 381 if sys_ss.issiso(): >>> > 382 return >>> > sys_ss >>> > >>> > >>> > /usr/local/lib/python3.6/site-packages/control/statesp.py in >>> _convertToStateSpace(sys, **kw) >>> > 895 # transfer function to state space conversion now >>> should work! >>> > 896 >>> > ssout = td04ad('C', sys.inputs, sys.outputs, >>> > >>> > --> 897 >>> > denorder, den, num, tol=0) >>> > >>> > 898 >>> > >>> > >>> > 899 states = ssout[0] >>> > >>> > >>> > >>> > /usr/local/lib/python3.6/site-packages/slycot/transform.py in >>> td04ad(rowcol, m, p, index, dcoeff, ucoeff, tol, ldwork) >>> > 446 e = ValueError(error_text) >>> > 447 e.info = out[-1] >>> > --> 448 raise >>> > e >>> > >>> > 449 if out[-1] > 0: >>> > 450 error_text = "The leading coefficient of a denominator >>> polynomial is nearly zero; calculations would overflow; no state-space >>> representation was calculated. >>> ABS(DCOEFF("+str(out[-1])+",1))="+str(abs(dcoeff(out[-1],1)))+" is too >>> small." >>> > >>> > >>> > >>> > ValueError: The following argument had an illegal value: dcoeff >>> > >>> > -- >>> > Dr. Ryan Krauss >>> > Associate Professor >>> > Product Design and Manufacturing Engineering >>> > Grand Valley State University >>> > <illegeal_dcoeff.ipynb>_______________________________________________ >>> > python-control-discuss mailing list >>> > pyt...@li... >>> > https://lists.sourceforge.net/lists/listinfo/python-control-discuss >>> >>> >>> _______________________________________________ >>> python-control-discuss mailing list >>> pyt...@li... >>> https://lists.sourceforge.net/lists/listinfo/python-control-discuss >>> >> |