CODEWITHSUNDEEP
arraysrmerge
user2543427
user2543427

Reputation: 133

Merge Two Arrays in R

Suppose I have two arrays, array1 and array2, that look like

array1

        45    46   47    48    49    50
        1.0   1.5  1.3   1.2   0.9   1.1

array2

        45    46   47    48    49    50
        2.5   5.5  4.5   5.8   1.5   8.4

and I want to merge them into a data frame that looks like:

       1.0  2.5
       1.5  5.5
       1.3  4.5
       1.2  5.8
       0.9  1.5
       1.1  8.4

The numbers 45 to 50 don't matter.

Upvotes: 8

Views: 41919

Answers (3)

Toseef Ahmed Abbasi
Toseef Ahmed Abbasi

Reputation: 25

You can merge to arrays by below given code and can display in required format.

            for (int i = 45; i <=50; i++)
            {

                float[] merge = { array1[i], array2[i] };

            }
           // to display in required format

            for (int j =0; i <merge.Length; i++)
            {

                Console.WriteLine(merge[i]);

            }

Upvotes: -3

dayne
dayne

Reputation: 7784

You should be able to combine ?rbind and ?t, or just use ?cbind depending on the format of your data.

For example:

new.array <- t(rbind(array1,array2))

or 

new.array <- cbind(array1,array2)

or 

new.arrray <- data.frame(array1,array2)

If you have two vectors, cbind is the best way to go. However, suppose you have two data frames. ie:

array1 <- t(data.frame(array1=c(1.0,1.5,1.3,1.2,0.9,1.1)))
array2 <- t(data.frame(array2=c(2.5,5.5,4.5,5.8,1.5,8.4)))

Using cbind will not give the desired output, and you will need to combine t and rbind.

> cbind(array1,array2)
       [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12]
array1    1  1.5  1.3  1.2  0.9  1.1  2.5  5.5  4.5   5.8   1.5   8.4

> t(rbind(array1,array2))
     array1 array2
[1,]    1.0    2.5
[2,]    1.5    5.5
[3,]    1.3    4.5
[4,]    1.2    5.8
[5,]    0.9    1.5
[6,]    1.1    8.4

Upvotes: 1

Mayou
Mayou

Reputation: 8828

 array1 <- c(1.0,1.5,1.3,1.2,0.9,1.1)
 array2 <- c(2.5,5.5,4.5,5.8,1.5,8.4)

 result = cbind(array1, array2)

In case you don't want to see any column names or row names (as posted in your question), you should do the following:

 result = as.matrix(cbind(array1, array2)) 
 dimnames(result) <-list(rep("", dim(result)[1]), rep("", dim(result)[2]))

You get: 

 > result

  1.0 2.5
  1.5 5.5
  1.3 4.5
  1.2 5.8
  0.9 1.5
  1.1 8.4

Upvotes: 13

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