operands

问题 After I run the code in matlab, I encounter this error and unsure how to solve it. How can I solve this problem. Warning: Operands to the || and && operators must be convertible to logical scalar values. Jgray = double(rgb2gray(J)); % Calculate the Gradients [dIx, dIy] = gradient(Jgray); if max(dIx)<=103 && max(dIy)<=100 B = abs(dIy) - abs(dIx); else B = abs(dIx) - abs(dIy); end 回答1: If dIx and dIy are matrices (as opposed to 1-D vectors), max(dIx) and max(dIy) will return vectors. && and ||

问题 I am trying to implement the Naive Gauss and getting the unsupported operand type error on execution. Output: execfile(filename, namespace) File "/media/zax/MYLINUXLIVE/A0N-.py", line 26, in <module> print Naive_Gauss([[2,3],[4,5]],[[6],[7]]) File "/media/zax/MYLINUXLIVE/A0N-.py", line 20, in Naive_Gauss b[row] = b[row]-xmult*b[column] TypeError: unsupported operand type(s) for -: 'list' and 'list' >>> This is the code def Naive_Gauss(Array,b): n = len(Array) for column in xrange(n-1): for

问题 the error is in AfterLoop skope in the line " mov [esi], [edi]" . how can I resolve this issue? ; The function for node removing (headptr, nodeToremove) removeNode proc headPtr = 8 nodeToRemove = headPtr + 4 push ebp mov ebp, esp push esi push edi push ebx mov esi, headPtr[ebp] ; esi = head of list mov edi, [esi] ; edi = second item cmp esi, nodeToRemove[ebp] ; head = nodeToRemove? jne NextNode mov edi, esi ; edi ( = currNode) = head mov esi, [esi] ; new head = head->next jmp AfterLoop

问题 I\'m going through the LPTHW and I came across something I cannot understand. When will it ever be the case that you want your boolean and or or to return something other than the boolean? The LPTHW text states that all languages like python have this behavior. Would he mean interpreted vs. compiled languages or duck typed vs static typed languages? I ran the following code: >>> False and 1 False >>> True and 1 1 >>> 1 and False False >>> 1 and True True >>> True and 121 121 >>> False or 1 1