cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Showing results for 
Search instead for 
Did you mean: 

Community Tip - Did you get called away in the middle of writing a post? Don't worry you can find your unfinished post later in the Drafts section of your profile page. X

Why two different Results in Matrix Multiplication

SFares
12-Amethyst

Why two different Results in Matrix Multiplication

Hello,

Attached is Mathcad 15 file. I don't know why i am getting two different results with matrix multiplication.

SFares_0-1629377930018.png

Thanks,

Sam

1 ACCEPTED SOLUTION

Accepted Solutions
StuartBruff
23-Emerald II
(To:SFares)

Because the displayed values of your calculations of k' and deltaM75 are only accurate to 3 or 4 decimal places.   Try displaying the results to 7 decimal places and multiplying, and you should get agreement (1.3922).

 

Stuart

View solution in original post

3 REPLIES 3
StuartBruff
23-Emerald II
(To:SFares)

Because the displayed values of your calculations of k' and deltaM75 are only accurate to 3 or 4 decimal places.   Try displaying the results to 7 decimal places and multiplying, and you should get agreement (1.3922).

 

Stuart

SFares
12-Amethyst
(To:StuartBruff)

I never thought that the number of decimals make such a difference. Thank you so much Stuart!

 

Regards,

Sam

StuartBruff
23-Emerald II
(To:SFares)

No worries, Sam, it had me puzzled for a bit until the word "round-off" popped into my skull.

 

Stuart

Top Tags