Solving MATLAB Questions: Quick Answer to Formatting Output

[TheloniousMONK]

I am pretty new to MATLAB and am having a problem formatting my output. I have two questions:

1. How do I display the sign of a number in front of it similar to showpos in C++? For example, if a = 72, I want to display '+72', but if a = -72, I do not want to display '+-72'.

2. Is there a way to make it make imaginary output use j instead of i without doing something like:

num2str( real(Comp1) , '%.3f' ) + num2str( imag(Comp1) , '%.3fj' )

Any help would be greatly appreciated.

 

[SGT]

I am pretty new to MATLAB and am having a problem formatting my output. I have two questions:

1. How do I display the sign of a number in front of it similar to showpos in C++? For example, if a = 72, I want to display '+72', but if a = -72, I do not want to display '+-72'.

2. Is there a way to make it make imaginary output use j instead of i without doing something like:

num2str( real(Comp1) , '%.3f' ) + num2str( imag(Comp1) , '%.3fj' )

Any help would be greatly appreciated.

To display the sign you may use the + flag in the format. For instance:
fprintf(fid,'%+g',a), will print +72 if a=72 and -72 if a=-72.
fid is the file identifier. It is 1 for the screen.

 

[tacman]

1. To display the sign of a number in front of it, you can use the fprintf function in MATLAB. For example, if you have a variable a that contains your number, you can use the following code to display it with the sign in front:

fprintf('%+d', a)

The '%+d' format specifier will display the sign in front of the number, and the 'd' indicates that it is an integer. You can also use '%+f' if your number is a floating-point value.

2. To make imaginary output use 'j' instead of 'i', you can change the default imaginary unit in MATLAB. You can do this by going to the Home tab, clicking on Preferences, and then selecting MATLAB > General > Display. From there, you can change the default imaginary unit from 'i' to 'j'. This will apply to all your output, so you don't need to use num2str to format it separately.