matrix function that compare a list of real numbers with a real number

I need a function which accepts as input a list of real numbers, and a real number X and which returns to the output:

• The number of how many times the number (X) appear in the table

• The location where this number appears in the table

• A table that will have the value 0 in the positions where (X) appears and the value -1 in the remaining positions

• A table(matrix) where the elements of the original matrix that is larger than the input number (X) will be replaced with the maximum number of the original table

• A vector which will contain all the unique elements of the input table which are larger than the number(X) we gave to the entrance.

[Matt J]

Please stop using this site as a homework solving service. All the things you should have learned from the problem we discussed yesterday

http://www.mathworks.com/matlabcentral/answers/54048-how-can-i-make-a-matlab-function-that-ll-take-as-entrance-two-matricies-a-and-b

can be applied to this problem now.

[felix]

sorry about that. can you link me where i can lear basic about matricies or generaly about matlab functions?

Answer 1

[Image Analyst]

OK. Do you have a question? Why don't you just use unique():

allTheNumbers = unique(X);

and then find out where they occur

mapOfNumber = (X == allTheNumbers(1)); % Find out where the first number occurs.

and so on.

If you have floating point numbers, not numbers of class "int32" or other integer types, be aware of the FAQ: http://matlab.wikia.com/wiki/FAQ#Why_is_0.3_-_0.2_-_0.1_.28or_similar.29_not_equal_to_zero.3F