topic Is it possible to make the x-axis logarithmic axis but without using Logarithmic scaling option? in Mathcad

Is it possible to make the x-axis logarithmic axis but without using Logarithmic scaling option?

Cornel — Mon, 13 Feb 2023 19:16:10 GMT

Hello,

My question here is: how can I make the x-axis of the frequencies (freq) be the logarithmic axis (Log10), but without using the Logarithmic scaling option from the menu?

Same thing for the Phase plot:

Mathcad Prime 8 file attached.

Excel FirstGraphPlot.xlsx file attached.

Excel SecondGraphPlot.xlsx file attached.

Thank you.

Re: Is it possible to make the x-axis logarithmic axis but without using Logarithmic scaling option?

Werner_E — Mon, 13 Feb 2023 20:04:21 GMT

I am not sure what your problem is - is it the very last plot??

You simply have to change the scale values to see the plot.

Either manually change the three values (first, second and last axis tick) or delete all three of them to let Prime choose its own scaling.

Re: Is it possible to make the x-axis logarithmic axis but without using Logarithmic scaling option?

Cornel — Mon, 13 Feb 2023 20:20:26 GMT

Shouldn't the x-axis look the same for both plots?

The second graph (without using the Logarithmic scaling option from the menu) seems to be shifted (or something like that).

Shouldn't the x-axis look the same for both plots?

Re: Is it possible to make the x-axis logarithmic axis but without using Logarithmic scaling option?

Werner_E — Tue, 14 Feb 2023 02:21:57 GMT

> Shouldn't the x-axis look the same for both plots?

Sure not!

If you use "normal" values x and a logarithmic scale you will see, e.g. 1000.

If you use 20*log(x) at the same point you should just see 60.

Re: Is it possible to make the x-axis logarithmic axis but without using Logarithmic scaling option?

ValeryOchkov — Wed, 15 Feb 2023 18:07:54 GMT

Do you remember?

When I was a student, I could buy with my monthly stipend 5500 of these sheets of millimeter paper with a logarithm along two axes!