> # iterate the result.Įxplanation for itertools. #below single line is enough to solve your problem # compress will match pair from list a and the boolean list, if item in boolean list is true, then item in list a will be remain ,else will be dropped > press(d, map(lambda x: x>4, a)) # magic here ! zeros () creates array containing all element as zero or empty value. In your case i is from -5 to 4, so there are 10 elements in input, which would be from 1 to 10 i.e j in matlab. You have to manipulate them depending on how many elements are present in your input. If you want to find which rows contain zeros rather than where each zero is located. i corresponds to what shown in your attahced formula, j is the respective indices in MATLAB. If X is a vector, then find returns a vector with the same orientation as X. I want to find the indices to the rows that contain 0 and I used. k find (X, n): It returns the first n indices of non zero elements in X k find (X, n, direction): direction can be ‘first’ or ‘last’. Call the nexttile function to create an axes object and return the object as ax1. k find (X) returns a vector containing the linear indices of each nonzero element in array X. > map(lambda x: x>=4, a) # this will return a boolean list Syntax: Below are various ways to use the function: k find (X): It returns the indices of all non zero elements. Another way for a oneliner with list comprehension is by finding all ocurences of 0 and find the highest index with max () like this: a 1,-2,3,0,2,0,-2,0,0,0 def getlastnonzeroidx (mylist): return max ( index for index, el in enumerate (mylist) if el) print (getlastnonzeroidx (a)) > 6. Use press with single line in Python to finish close this task > a = What we do is to add a condition on it by specify "if" follow by a boolean expression > In Matlab I can find all non zero entries in a vector like this: > v 0. This code does nothing but return all pairs that zipped up. Syntax: find (X) : Return a vector containing the indices of elements find (X. List comprehension is a shortcut to loop an element over list which after "in", and evaluate the element with expression, then return the result to a list, also you can add condition on which result you want to return > Zip function will return a list of tuples > zip(a,x) OK, I understand what you mean and a Single line of Python will be enough:
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