Wrong behaviour in logarithmic plots?

Hi,

Welcome to this forum.

1. Please attach the (Prime) worksheet.

2. Did you define Rs? If yes: How is it defined?

Success!
Luc

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@CH_10552914 wrote:

Hello,

my Company forces me to switch from MathCAD15 to prime 10.

My condolences to you!

I can confirm that in Prime the quickplot feature (plotting without defining the abscissa variable) with a logarithmic ordinate axis is broken.
As you already suspected, the values still are spaced linear which is unusable.

Mathcad 15:

The same in Prime 10 (using the default 500 points):

A possible way around this bug could be to define the ordinate values as a vector with logarithmically spaced values created with "logspace".

Here again using 500 points:

Vectorization (the arrow over the expression) is not mandatory in case of the function f used here but may be needed for other functions. So I consider it a good idea to use explicit vectorization every time you feed a vector as argument in a function written for scalar arguments.

BTW, I notice that the picture of the MC15 plot you attached showed a plot using a secondary y-axis. Primes native plots do not provide a secondary y-axis (and no labels and no grid lines ...). PTC therefore, instead of improving the native plots, had integrated a third party tool ("Chart component") which has a second y-axis, labels, gridlines, but also its own drawbacks - apart from being really slow it does not know anything about units. If the secondary y-axis is mandatory you would have to use that Chart component to create the plot.