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cpreston6-Contributor
6-Contributor
September 30, 2020
Solved

How to convert vectors to scalars in MathCAD Prime 6

  • September 30, 2020
  • 1 reply
  • 3994 views

cpreston_0-1601491852470.png 

Second column is the radial break at different tensile strengths from a detonating blasthole

 Third column is the value of tensile stress for radial break of column two,

cpreston_1-1601492041511.png

This is the formula that uses the above input to calculate the number of cracks at each tensile strength for each radial distance away from the blasthole.

I am using the chart component to plot the number of cracks for each break radius.  How do I set up Y and X to  get a plot? I believe I need to change the vectors to scalars. I have posted my worksheet. Please refer to page 2 only.

 

cpreston_2-1601492396502.png

 

 

Best answer by Werner_E

When you defined your vectors nAt.1 and others you used vector subscripts and so you defined a nested vector - a 1x1 vector whose only element is this 5x1 vector. The plot component did not like this for some reason.
I don't think that this was done intentionally by you- So just use a literal subscript and the component is happy.

I guess the component was placed a bit too high and I had to drag it down a little bit so it recognizes the variables defined to the left of it (Prime read left to right and from top down).

I also included the same plot done with Primes native plot facility (no labels, no grid lines, no secondary y-axis) to show that, unlike the purchased third party plot component, it at least also supports units (note the cm at the x-axis).

Werner_E_0-1601494519636.png

 

Prime 6 file attached

 

1 reply

W
Werner_E25-Diamond IAnswer
25-Diamond I
September 30, 2020

When you defined your vectors nAt.1 and others you used vector subscripts and so you defined a nested vector - a 1x1 vector whose only element is this 5x1 vector. The plot component did not like this for some reason.
I don't think that this was done intentionally by you- So just use a literal subscript and the component is happy.

I guess the component was placed a bit too high and I had to drag it down a little bit so it recognizes the variables defined to the left of it (Prime read left to right and from top down).

I also included the same plot done with Primes native plot facility (no labels, no grid lines, no secondary y-axis) to show that, unlike the purchased third party plot component, it at least also supports units (note the cm at the x-axis).

Werner_E_0-1601494519636.png

 

Prime 6 file attached

 

    C
    cpreston6-ContributorAuthor
    6-Contributor
    September 30, 2020
    Thanks very much. Works like a charm and I should know better.

    Chris Preston P.Eng MCP
    Consulting Engineer - Professional Engineers Ontario,
    VP Research and Development - iRing INC, Nexco INC
    T: 1 (705) 840-6000 x 249 C: 1 (705) 492-9773 F: 1 (705) 840-6001
    E: chris.preston@iring.ca W: www.iring.ca<>

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