Solve this system with computer

[markraz]

Hi does anyone know how to solve this system with a computer? I get a "non square matrix" error with python and other languages. Any ideas? can this somehow be rearranged?
thanks

 

[Deleted member 4993]

Hi does anyone know how to solve this system with a computer? I get a "non square matrix" error with python and other languages. Any ideas? can this somehow be rearranged?
thanks
View attachment 24466

You have 3 equations and 4 unknowns. You need to have another equation or "constraint" to be able to solve for those 4 unknowns uniquely.

 

[markraz]

You have 3 equations and 4 unknowns. You need to have another equation or "constraint" to be able to solve for those 4 unknowns uniquely.

thanks, is there a standard procedure for adding a constraint? or another equation? is it some variation of the the other 3 equations? thanks

 

[Steven G]

This is what wolfram got. Does this help?

 

[Steven G]

How about adding a row of zeros, a dummy variable and a column of zeros?

 

[markraz]

This is what wolfram got. Does this help?

thanks that is a great. one question They solve for z


could I solve for any of the other variables? and get the same final answer?

thanks again

 

[markraz]

How about adding a row of zeros, a dummy variable and a column of zeros?

so like this?

1 1 -1 -1 = 1
3 4 -1 -3 = 1
4 6 1 -5 = 1
0 0 0 0 = 0



thanks

 

[Steven G]

thanks that is a great. one question They solve for z
View attachment 24475

could I solve for any of the other variables? and get the same final answer?

thanks again

Look at where it says real solution and where it says solution as those are the solutions! They happen to be the same since s'solution' include complex solutions and there are none.

 

[Steven G]

so like this?

1 1 -1 -1 = 1
3 4 -1 -3 = 1
4 6 1 -5 = 1
0 0 0 0 = 0

View attachment 24478

thanks

Are you trying to program this? Or are you trying to use online software that is complaining about a non square system? If the 2nd, then just use Wolfram Alpha.

 

[markraz]

View attachment 24477

Are you trying to program this? Or are you trying to use online software that is complaining about a non square system? If the 2nd, then just use Wolfram Alpha.

Hi ,yeah I am writing a C++ computer program. It doesn't like the non square matrices. I'm trying to get around that limitation.
thanks