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change single cell in a matrix by index number in r

# Create a sample matrix
mat <- matrix(1:9, nrow = 3, byrow = TRUE)
print(mat)

# Change a single cell in the matrix by index number
row_index <- 2
col_index <- 3
mat[row_index, col_index] <- 99
print(mat)
206 chars
10 lines

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related categories

r
matrix

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