Turning a product of two vectors into a matrix without using for loops?

Question

daniel adams 2021-10-8

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https://ww2.mathworks.cn/matlabcentral/answers/1469706-turning-a-product-of-two-vectors-into-a-matrix-without-using-for-loops

回答： Star Strider 2021-10-8

采纳的回答： Star Strider

I have to two vectors x and y, each of length n. I want a matrix M where the elements of M are

. How can I construct M on matlab without using a for loop?

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Answer 1

Star Strider 2021-10-8

1
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https://ww2.mathworks.cn/matlabcentral/answers/1469706-turning-a-product-of-two-vectors-into-a-matrix-without-using-for-loops#answer_804296

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I believe something like this should do what you want —

x = 1:10
x = 1×10
     1     2     3     4     5     6     7     8     9    10
y = 11:20
y = 1×10
    11    12    13    14    15    16    17    18    19    20
M = x(:)*y
M = 10×10
    11    12    13    14    15    16    17    18    19    20
    22    24    26    28    30    32    34    36    38    40
    33    36    39    42    45    48    51    54    57    60
    44    48    52    56    60    64    68    72    76    80
    55    60    65    70    75    80    85    90    95   100
    66    72    78    84    90    96   102   108   114   120
    77    84    91    98   105   112   119   126   133   140
    88    96   104   112   120   128   136   144   152   160
    99   108   117   126   135   144   153   162   171   180
   110   120   130   140   150   160   170   180   190   200