How to fix code?

I am using matlab for the first time. When I make a mistake or a fat finger but do not catch the mistake before hitting enter, is there a way to go back and fix this? My teacher says he does not know of a way other than re typing entire program again. Seems odd that if you get all the way through your program and there is a typo that you have to completely reenter all code.

Thanks!

Answer 1

[Image Analyst]

You are entering your text into a text editor window aren't you? You're not just typing a bunch of lines into the command window are you? So if you're in the text editor, you just make any changes and then hit F5 or click the green triangle. If it's running and you need to stop it early, type control-c. If you hit a 4 and really wanted a 2, just type backspace to get rid of the 4 and then type 2. These are my guesses because you've confused two of us now as to what you actually mean. I'm sure you've used a word processor before or typed things into the computer so I don't really know what the issue is, because this is so basic.

[Pawan Khanal]

how about writing in command line ???

[Image Analyst]

No, I would not recommend typing an entire program into the command line. I don't even know if it's possible. You need to write your code into a script. Once done, you can then run your function from the command line if you pass in the required input arguments.

Answer 2

[Azzi Abdelmalek]

You can undo by typing ctrl+z

[Azzi Abdelmalek]

Jhon commented

So if the error is at the beginning of the program will ctrl+z get rid of all code after the mistake or just the mistake? By mistake I mean I enter a 4 instead of a 2, just a fat finger.

Thanks,

[Azzi Abdelmalek]

This is not clear for me, can you explain what you mean by go back and fix the error, maybe I misunderstood you

Answer 3

[John Foster]

OK, thank you. Like I said I figured there had to be a way but the professor said the only way was to clear the page and retype everything. This is very time consuming. I have 9 exercises to do and they are close to the same code. It would save me some time if I can just change portions of the code instead of re typing the whole thing. Thanks for your replies!!

[Azzi Abdelmalek]

Is this an answer or a comment? if you want to add a comment, click on [comment on this answer]

[Image Analyst]

I'm still not sure if you know how to edit your code or not? Are you all set now, or do you still have questions about how to do it? I'm sure your professor knows how to edit code - there must have been some kind of miscommunication between you two. He didn't know what you were asking or thought he was asking a different question or something.

[John Foster]

The way we were shown was to enter in the command window. I will look for the text editor.

[Image Analyst]

John, entering it into the command line is not for multiple lines of code unless you want the problem of having to hit up arrow or retyping. Virtually everyone uses text windows unless it's for just a line or two. If using the text editor works for you, and I helped you discover this, mark my answer (not yours) as Accepted. Thanks.

Answer 4

[per isakson]

Watch the video

Working in The Development Environment (5 min, 21 sec)

There are more

http://www.mathworks.com/help/matlab/examples/index.html

IMO: They are good