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.
采纳的回答
Alexander
2012-3-19
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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