solve with parameter
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hello, i need to solve the equation with parameter. I have a problem with solution.
First, I wrote easy equation with parameter n.
syms x positive
n=2;
solve(x-n) %equation has this form x-n=0
it works great
then I wrote
n=2;
solve(-n+x)
but the solution was not equal as in the first case.
I dont know what's wrong. Can you help me please. Thank you.
2 comentarios
Alexander
el 19 de Mzo. de 2012
I get the same result in both cases:
ans =
2
I have no idea what's wrong. Could you please share your results?
Respuesta aceptada
Alexander
el 19 de Mzo. de 2012
Try to avoid num2str during calculations. This will convert the input into a string. A string is basically an array of character codes. If you do anymore calculations with it, it will be treated as an array of values, like in this example
>> A = num2str(12345);
>> A+0
ans =
49 50 51 52 53
The number 50 stands for the character '2'. This is why -n results in -50 in your example above.
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