No GOTO in MATLAB. Need Help!

[Liam]

I know there is not GOTO in MATLAB, so I need some help.

I've been making some old fortran code into matlab langauge and I cant work out how to get round my problem.

I present the code below, it is obvious to see where the GOTO is used. Can anyone help?

for J = IN2F:IN2L;

1

B = H2(J) - H1(K);

if abs(B)<0.1*10^-7;
W2(J) = W1(K);

elseif (B<0) && (K==1) | (B>0) && (K==N1);
W2(J) = 0.0;

elseif B<0;
W2(J)=W1(K-1) + (W1(K)-W1(K-1))*((H2(J)-H1(K-1))./(H1(K)-H1(K-1)));

else
K = K + 1;

GOTO 1

end

end

I've trawelled over the net but not found any sucessful solution yet, so any input would be welcomed.

Thanks in advance

Liam

[Rune Allnor]

On 11 Nov, 15:26, "Liam " <lDOTtal...@reading.acDOTuk> wrote:
> I know there is not GOTO in MATLAB, so I need some help.
>
> I've been making some old fortran code into matlab langauge and I cant work out how to get round my problem.

The solution is to find out what the function does and
program it in the language of your choise. One place
to start might be a text on assembler programming, where
one still uses the old GOTO type constructs to implement
stuff like for loops, while lopps and conditional branching.

Once you know the generic patterns you *might* have a
chance to decode code like the one you posted.

Rune

[Husam Aldahiyat]

"Liam " <lDOTt...@reading.acDOTuk> wrote in message <gfc4lr$jc2$1...@fred.mathworks.com>...

Use RECURSION via FUNCTION, FOR, IF and BREAK.

[David]

for J = IN2F:IN2L;

while(1) % infinite loop

B = H2(J) - H1(K);
if abs(B)<0.1*10^-7;
W2(J) = W1(K);

break;

elseif (B<0) && (K==1) | (B>0) && (K==N1);
W2(J) = 0.0;

break;

elseif B<0;
W2(J)=W1(K-1) + (W1(K)-W1(K-1))*((H2(J)-H1(K-1))./(H1(K)-H1(K-1)));

break;

else
K = K + 1;

end %end of else
end %of while loop
end %of for loop

there are probably better ways if you restructure the if statement and get rid of the infinite loop but this most closely approximates the fortran i think... not tested.

[Carlos Adrian Vargas Aguilera]

You should use a counter ans a WHILE loop instead of a FOR loop because of your variable counter.

Carlos

[Husam Aldahiyat]

Yeah, I forgot, you don't need to use FOR at all.

[Jack]

Replace goto 1 with continue in the matlab version of your function.

Jack Walker