Top Average
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Create a Matlab function according to the following:
Function name: topaverage
Input:
1. list of real numbers
2. real number
Output:
1. real number that is the average of all items in input #1 that are
equal to or greater than input #2
Example:
r=topaverage([3 6 10 12], 10)
r =
11
How do I get the program to relate the input #2 to one of the elements in the list and only start the average calculation from there? I know I have to sort from lowest to largest... I'm just stuck.
3 个评论
Jan
2011-11-22
The usual procedure for homework questions is, that you show, what you have done so far and ask a specific question. If we post solutions, you could hardly claim, that you've solved your homework by your own.
@Walter: It might be useful to know, what you have changed.
Walter Roberson
2011-11-22
I code-indented the first part, as it was obviously a quote from an assignment.
Jan
2011-11-22
Thanks, Walter. I hope you get extra-credits for the night-shift.
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Andrei Bobrov
2011-11-22
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[deleted]
4 个评论
Jan
2011-11-22
@Andrei: It is not really helpful to solve homework questions. What will Stephanie's teacher think about this solution?
Andrei Bobrov
2011-11-22
Hi Jan! A teacher may request an explanation of this solution
Jan
2011-11-22
@Andrei: Yes. And if Stephanie asks in another Matlab forum "what does '@(x,y)mean(x(x>=y))' exactly mean" I'd be naive enough to answer this.
Andrei Bobrov
2011-11-22
Stephanie would be shipped to the MATLAB help.
e.g. http://www.mathworks.com/help/techdoc/ :)
Image Analyst
2011-11-22
Hint:
thresholdedIndexes = yourArray > thresholdValue;
Then look up "logical indexing" and inputdlg() in the help.
3 个评论
Jan
2011-11-22
"inputdlg()"? No doubt, it is not a bad idea to read the documentation of "inputdlg", but it does not concern the question. So I'd suggest to read "doc save" instead, or even better: http://matlab.wikia.com/wiki/FAQ - profit from the problems of others!
Image Analyst
2011-11-22
I thought she could use it to ask the user for one or both of the input arguments to be passed to her "topaverage" function. Seems quite reasonable to me, actually even more flexible than if they were hard coded into the m-file. On the other hand I'm not sure where she'd use save() unless it would be to save the output argument "r" to a mat file for some reason.
Jan
2011-11-22
Dear Image Analyst: No, she does not need SAVE currently. But questions concerning "save(Name)" versus "save('Name')" occur such frequently in the Matlab forums, that reading "help save" four times is simply a good idea.
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