subscript problem

[sjjustine]

What does it mean when you try to plot y=mx+b diagram and mathcad is complaining on subscript index([i) which is no x[i. It says "the value of subscript or superscript is too low or too small for this array"
Can not find anything wrong with what I have do. I have done exactly the same thing before and it worked.

 

[mathemagician]

Make sure that ORIGIN=the starting index of
your array. Please read the ORIGIN command !

Take care,

The MathMagician

 

[sjjustine]

How can I solve eq below in mathcad.
Mol=x*mass, where x is four differents and mass is a constant. I need to calculate Mol for different x. All four values for x is known.

 

[IRstuff]

Lots of ways

> Read the manual
> Make mol a function by defining it as mol(x):=x*mass
assign x as a matrix of known values



TTFN

 

[cuky2000]

One way to s follow:

o Constant definition:
ex. Intercept b=-3.1
slope m= 1
Index range i:0;3 (assume default ORIGIN:0)

o Varibles definition:
4 values x[i:2,5,9,7

o Equation definition:
- Using index, i

y[i : m*x[i + b

y[i= (see result in MathCad
[i] - Using function [/i]

Y(X): m*X + b

Y(2) = (see result in MathCad
Y(-123)= (see result in MathCad

 

[sjjustine]

Thank u it worked