lists into .mat file

[Ronak]

How to write multiple lists into one .mat file?

[technocrat]

cbind or rbind. Have to be all numeric or all character, and of equal length

[technocrat]

Not sure what you mean by grids. reprex maybe?

Do you want by row or by column?

V1 <- seq(1,10,1)
V2 <- seq(11,20,1)
V3 <- seq(21,30,1)

m_by_row <- # for OP to find
m_by_col <- # for OP to find

m_by_row
#>    [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
#> V1    1    2    3    4    5    6    7    8    9    10
#> V2   11   12   13   14   15   16   17   18   19    20
#> V3   21   22   23   24   25   26   27   28   29    30
m_by_col
#>       V1 V2 V3
#>  [1,]  1 11 21
#>  [2,]  2 12 22
#>  [3,]  3 13 23
#>  [4,]  4 14 24
#>  [5,]  5 15 25
#>  [6,]  6 16 26
#>  [7,]  7 17 27
#>  [8,]  8 18 28
#>  [9,]  9 19 29
#> [10,] 10 20 30

^{Created on 2019-12-28 by the reprex package (v0.3.0)}