multiple data frames with similar names - r

Question

I needed to generate array or many data frames from other data frames which only varied in names. This required me to do a lot of copy-paste works. Is it possible that I can make it cleaner but not keep copying and pasting? Follows are two examples from many similar cases of the analysis I am doing now (I will provide codes for reproduction at the end of the question), which I think may be able to make them cleaner with the same approach.
case 1, create an array with data from per_d1,per_d1,per_d3,per_d4,per_d5
perd <- array(dim=c(7,15,5))
perd [,,1] <- as.matrix(per_d$per_d1)
perd [,,2] <- as.matrix(per_d$per_d2)
perd [,,3] <- as.matrix(per_d$per_d3)
perd [,,4] <- as.matrix(per_d$per_d4)
perd [,,5] <- as.matrix(per_d$per_d5)
case 2, create multiple data frames from data with similar names.
dataplot <- dfmak (per_d$per_d1,ge$per_d1$g1,ge$per_d1$g2,ge$per_d1$g3,ge$per_d1$g4,ge$per_d1$g5)
dataplot2 <- dfmak (per_d$per_d2,ge$per_d2$g1,ge$per_d2$g2,ge$per_d2$g3,ge$per_d2$g4,ge$per_d2$g5)
dataplot3 <- dfmak (per_d$per_d3,ge$per_d3$g1,ge$per_d3$g2,ge$per_d3$g3,ge$per_d3$g4,ge$per_d3$g5)
dataplot4 <- dfmak (per_d$per_d4,ge$per_d4$g1,ge$per_d4$g2,ge$per_d4$g3,ge$per_d4$g4,ge$per_d4$g5)
dataplot5 <- dfmak (per_d$per_d5,ge$per_d5$g1,ge$per_d5$g2,ge$per_d5$g3,ge$per_d5$g4,ge$per_d5$g5)
codes for reproduction
N <- 1
CS <- 10.141
S <- seq (7.72,13,0.807)
t <- 15
l <- length (S)
m0 <- 100
exps <- c(0.2, 0.5, 0.9, 1.5, 2)
sd <- c(0.2, 0.5, 0.8, 1.3, 1.8)
names(sd) <- paste("per", seq_along(sd), sep = "")
per <- lapply(sd, function(x){
per <- matrix(nrow = length(S)*N, ncol = t+1)
for (i in 1:dim(per)[1]) {
for (j in 1:t+1){
per [,1] <- replicate (n = N, S)
per [i,j] <- round (abs (rnorm (1, mean = per[i,1], sd =x)),digits=3)
colnames(per) <- c('physical',paste('t', 1:15, sep = ""))
per <- as.data.frame (per)
}
}
per <- per [,-1]
return(per)
}
)
per_d <- lapply(per, function(x){
per_d <- abs (x - 10.141)
}
)
names(per_d) <- paste("per_d", seq_along(sd), sep = "")
gefun <- function (i){
res <- lapply(exps, function(x){
g <- as.matrix (m0 * exp (-x * i))
for (i in 1:l) {
for (j in 1:t){
g [i,j] <- abs((round (rnorm(1,mean = g[i,j],sd=3), digits = 3)))
colnames(g) <- paste('t', 1:ncol(g), sep = "")
g <- as.data.frame(g)
}}
return(g)
}
)
}
ge <- lapply(per_d, gefun)
for (i in 1:length(ge)){
names(ge[[i]]) <- paste("g", seq_along(ge), sep = "")
}
dfmak <- function(df1,df2,df3,df4,df5,df6){
data.frame(stimulus = c (paste0('S',1:3),'CS+',paste0('S',5:7)),
phy_dis = S,
per_dis = c(df1$t1,df1$t2,df1$t3,df1$t4,df1$t5,df1$t6,df1$t7,df1$t8,df1$t9,df1$t10,df1$t11,df1$t12,df1$t13,df1$t14,df1$t15),
trials = rep(1:15, each = 7),
response_0.2 = c (df2$t1,df2$t2,df2$t3,df2$t4,df2$t5,df2$t6,df2$t7,df2$t8,df2$t9,df2$t10,df2$t11,df2$t12,df2$t13,df2$t14,df2$t15),
response_0.5 = c (df3$t1,df3$t2,df3$t3,df3$t4,df3$t5,df3$t6,df3$t7,df3$t8,df3$t9,df3$t10,df3$t11,df3$t12,df3$t13,df3$t14,df3$t15),
response_0.9 = c (df4$t1,df4$t2,df4$t3,df4$t4,df4$t5,df4$t6,df4$t7,df4$t8,df4$t9,df4$t10,df4$t11,df4$t12,df4$t13,df4$t14,df4$t15),
response_1.5 = c (df5$t1,df5$t2,df5$t3,df5$t4,df5$t5,df5$t6,df5$t7,df5$t8,df5$t9,df5$t10,df5$t11,df5$t12,df5$t13,df5$t14,df5$t15),
response_2 = c (df6$t1,df6$t2,df6$t3,df6$t4,df6$t5,df6$t6,df6$t7,df6$t8,df6$t9,df6$t10,df6$t11,df6$t12,df6$t13,df6$t14,df6$t15)
)
}

Answer 1

You can try the followings. But the codes, unfortunately, are not short.
Case 1
a <- lapply(per_d, as.matrix)
b <- c(a, recursive = TRUE)
pred <- array(b, dim = c(7,15,5))
Case 2
The data frames will be stored in a list. You still have to extract them using $ or [[]].
# create empty lists to store the outputs
out <- list()
name <- list()
for(i in 1:5) {
a <- per_d[[i]]
b <- ge[[i]][[1]]
c <- ge[[i]][[2]]
d <- ge[[i]][[3]]
e <- ge[[i]][[4]]
f <- ge[[i]][[5]]
arg <- list(a, b, c, d, e, f)
name[[i]] <- paste0("df_", i)
out[[i]] <- do.call(dfmak, arg)
}
out <- setNames(out, name)