CODEWITHSUNDEEP
rggplot2anova
Nodali
Nodali

Reputation: 11

Error in data.frame: arguments imply differing number of rows

I tried to run anova for my data, but am stuck on this error. I'm a newbie in R. Please anyone can help me? Thank you in advance.

library(data.table)
library(ggplot2)

read_risk_data <- fread("Risk_v2.csv", select = c(1:7))
read_risk_data

read_risk_data[-c(1), ]
risk <- read_risk_data[-c(1), ]
risk

risk.1 <- risk[1:64, ]
risk.1

str(risk.1)
nrow(risk.1)
ncol(risk.1)
class(risk.1)

risk_vp <- c(rep('No.mitigation', 64), rep('Refrigeration', 64), rep('Depuration', 64), rep('Freezing', 64), rep('Thermal.treatment', 64), rep('Thermal.shock', 64), rep('Irradiation', 64))
risk_vp_level <- c(risk.1$No.mitigation, risk.1$Refrigeration, risk.1$Depuration, risk.1$Freezing, risk.1$Thermal.treatment,                      risk.1$Thermal.shock, risk.1$Irradiation)

risk_vp.1 <- t(risk_vp)
risk_vp.2 <- t(risk_vp.1)
risk_vp_level.1 <- t(risk_vp_level)
risk_vp_level.2 <- t(risk_vp_level.1)
df <- data.frame(risk_vp.2, risk_vp_level.2)

Here is the structure

Classes ‘data.table’ and 'data.frame':  64 obs. of  7 variables:
$ No mitigation    : num  2.18e-05 4.47e-05 9.43e-05 6.16e-05 2.60e-05 5.29e- 
05 1.10e-04 7.25e-05 2.80e-05 5.67e-05 ...
$ Refrigeration    : num  7.80e-06 1.10e-05 1.64e-05 1.30e-05 8.52e-06 1.20e- 
05 1.79e-05 1.42e-05 8.83e-06 1.24e-05 ...
$ Depuration       : num  7.11e-06 1.58e-05 3.67e-05 2.25e-05 8.57e-06 1.91e- 
05 4.41e-05 2.72e-05 9.28e-06 2.07e-05 ...
$ Freezing         : num  8.11e-06 1.79e-05 4.16e-05 2.55e-05 9.77e-06 2.17e- 
05 5.00e-05 3.08e-05 1.06e-05 2.35e-05 ...
$ Thermal treatment: num  3.44e-09 7.64e-09 2.00e-08 1.11e-08 4.11e-09 9.42e- 
09 2.55e-08 1.40e-08 4.42e-09 1.03e-08 ...
$ Thermal shock    : num  9.09e-10 2.00e-09 5.07e-09 2.89e-09 1.09e-09 2.46e- 
09 6.40e-09 3.60e-09 1.17e-09 2.67e-09 ...
$ Irradiation      : num  3.60e-10 8.25e-10 2.21e-09 1.22e-09 4.32e-10 1.03e- 
09 2.82e-09 1.54e-09 4.67e-10 1.13e-09 ...
- attr(*, ".internal.selfref")=<externalptr>

And, when I run this code:

df <- data.frame(risk_vp.2, risk_vp_level.2)

It gave me:

Error in data.frame(risk_vp.2, risk_vp_level.2) : 
arguments imply differing number of rows: 448, 256

Upvotes: 1

Views: 31226

Answers (1)

gaut
gaut

Reputation: 5958

This simply means that risk_vp.2 and risk_vp_level.2 have different numbers of rows. Try to run nrow(risk_vp.2) and nrow(risk_vp_level.2) or dim(risk_vp_level.2) after each operation to understand where the error is. Also note that 

c(rep('No.mitigation', 64), rep('Refrigeration', 64), rep('Depuration', 64), rep('Freezing', 64), rep('Thermal.treatment', 64), rep('Thermal.shock', 64), rep('Irradiation', 64))

Will create one vector of 7*64 elements - if you wanted to create a data.frame of 7 columns and 64 rows instead you should use cbind instead of c(). Finally, it is hard for us to help you if you don't give us some data that we can use on our side. Please provide minimal reproducible examples in the future - that do not depend on any external file.

Upvotes: 2

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