目錄

B = cumsum(A)

B = cumsum(A,dim)

B = cumsum(___,direction)

B = cumsum(___,nanflag)

• B = cumsum(A)

  A = 1:5;
  B = cumsum(A)

  

• A = [1 4 7; 2 5 8; 3 6 9]
  B = cumsum(A)   %求矩陣A每列元素之和

  

• 

• B = cumsum(A,dim)

• A = [1 3 5; 2 4 6]
  B = cumsum(A,2)    %求矩陣A每行元素之和；B = cumsum(A,1)按列求和
   
  

  
• 

• B = cumsum(___,direction)

• rng default;
  A = randi([1,10],3)  %建立一個3*3矩陣，元素值隨機取自1~10

  

• B = cumsum(A,2,'reverse')

  
   

• B = cumsum(___,nanflag)