Why I cannot create a counter plot

[ValeryOchkov]

Why I cannot create a counter plot - see please the picture and the Mathcad Prime 3.0 file in attach.

In Mathcad 15 no problem - see please One minimize problem - numerical and symbolical solutions

[AlvaroDíaz]

Hi Valery.

I guess that because Mathcad don't know which units have the arguments of the time function. Actually, the error message is the same if you call time(1, 2) instead time(1 m, 2 m).

Best regards.

Alvaro.

[ValeryOchkov]

Thans, Alvaro, for the answer.

I think we must do so. Only so - it is the question!

[AlvaroDíaz · Accepted solution]

Hi Valery.

But whith createmesh you have the option to make explicit the units for the arguments of the function to plot, and don't need to destroy the units in the calculations.

Best regards.

Alvaro.

[AlvaroDíaz]

Ah. Another workaround could be to define a local function inside plot, or a worksheet function, like t.units (x,y) <- t(x2*m, x3*m) and plot them.  --- Edited

Best regards.

Alvaro.

[ValeryOchkov]

I think it is a bug in Mathcad Prime and hope all will be OK in 4.0!

[ValeryOchkov]

AlvaroDíaz написал(а):

Hi Valery.

But whith createmesh you have the option to make explicit the units for the arguments of the function to plot, and don't need to destroy the units in the calculations.

Best regards.

Alvaro.

Yesss

[AlvaroDíaz]

Well, for me it is more than a bug in mathcad 15, which ignores the units in the plot evaluations, without an explicit option (like a new option, "Ignore Units", similar to "Optimize" and others). Looks more consistent in that sense Prime, with that error message. I'm not pretty sure if this is an actual bug, but make this automatic process hard to interpret for me.

Best regards.

Alvaro.

[ValeryOchkov]

Maple does not work with units in the X-Y-plot, 3D-plot, by optimization etc

One my Russian Mathcad-friend has tatu:

[AlvaroDíaz]

With that kind of ink and with of the needle, obviously not!

Best regards.

Alvaro.

[ViktorKorobov]

Valery friend is absolutely right.

[ValeryOchkov]

User: "Mathcad Prime is now not so good!"

PTC Mathcad team:  "No, Good! Good! Good...!" 

[ValeryOchkov]

One more - a junior issue (with 3 mistakes):

[ViktorKorobov]

Таки нету в жизни счастья. При попытке изменения размерности t указатели цветовой шкалы остаются в секундах.