[英]Is there a similar function to 'melt' in reshape2 in R that works in MatLab?
I'm trying to find a function in MatLab that is similar to the 'melt' function in the R package "reshape2", such that the row headers are repeated for each variable and stacked together. 我试图在MatLab中找到一个类似于R包“reshape2”中的'melt'函数的函数,这样就可以为每个变量重复行标题并将它们堆叠在一起。
eg: 例如:
If I have a matrix 如果我有一个矩阵
A 1 2 3
B 4 5 6
C 7 8 9
I'd like to change it to 我想改成它
A 1
A 2
A 3
B 4
B 5
B 6
C 7
C 8
C 9
Short of working a for() loop to go pair-wise through each column, is there a function that could do this? 如果没有使用for()循环来成对地通过每一列,是否有一个函数可以做到这一点?
Many thanks, KRB 非常感谢,KRB
Matlab has stack
and unstack
functions, operating on tables, which are similar to melt
and cast
. MATLAB具有
stack
和unstack
功能,上表中,其类似于操作melt
和cast
。 Something like this would work 像这样的东西会起作用
groups = {'A'; 'B'; 'C'};
A1 = [1; 4; 7];
A2 = [2; 5; 8];
A3 = [3 ; 6; 9];
T = table(groups, A1, A2, A3)
TLong = stack(T, 2:4)
which gives 这使
TLong =
groups A1_A2_A3_Indicator A1_A2_A3
______ __________________ ________
'A' A1 1
'A' A2 2
'A' A3 3
'B' A1 4
'B' A2 5
'B' A3 6
'C' A1 7
'C' A2 8
'C' A3 9
Note that your example matrix cannot exist in Matlab (or R) as matrices cannot contain strings or mixed types. 请注意,您的示例矩阵不能存在于Matlab(或R)中,因为矩阵不能包含字符串或混合类型。 I recommend you convert whatever structure you have now to a
table
if you want to use a inbuilt function. 如果您想使用内置函数,我建议您将现有的任何结构转换为
table
。
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