[Scilab-users] Variable user equation input (2, 3 or more)

[Lester Anderson]

Having an issue with the code:

Tried: x ≡ 2 mod 11; 3 mod 12; 4 mod 13; 5 mod 17; 6 mod 19 (result should
be 150999 but get 442719)
Also checked x ≡ 4 mod 11; 3 mod 17 (result should be 37 but get 136)
However, 3 equations work fine!

I have pinned down the problem to M_inv, where it is not looping through
all elements (m) but doing one less (eg 4 instead of 5).

for i=1:length(m)
    for j=1:n
        if modulo(((M_ratio(i)*j)-1),m(i)) == 0
        M_inv(i)=j;
        xn(i)=(a(i)*M_ratio(i)*M_inv(i));
        end
    endend

With the code snippet above, it should iterate 5 times for 5 input
values of a and m, it is not generating M_inv(5), or M_inv(2) (2
equations).

I have verified what the results should be in Maxima CAS,

[image: image.png]

Any ideas what is going wrong?

Thanks

On Sun, 1 May 2022 at 05:32, Lester Anderson <arctica1963 at gmail.com> wrote:

> Many thanks Samuel
>
> On Sat, 30 Apr 2022 at 17:28, Samuel Gougeon <sgougeon at free.fr> wrote:
>
>> Le 30/04/2022 à 18:26, Samuel Gougeon a écrit :
>>
>> Le 30/04/2022 à 18:14, Lester Anderson a écrit :
>>
>> Sorted the code with multiple equations. Not too sure how to deal with
>> the messagebox list of equations.
>> Still have to do that manually - unless there is a way to automatically
>> build this?
>>
>> Can this multiple text string be done via a for loop to build a list ?
>>
>> Thanks
>>
>>
>> Please \n as trailer for the 2nd msprintf as well:
>>
>> [ msprintf("x ≡ %d  mod %d\n", a(:), m(:))
>>    msprintf("The solution for (x): %d mod %d\n", x(:), M(:))
>>                     'Solution of 3 congruence equations']
>>
>>
>>
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