'X' and 'Y' Lengths Differ Error When Plotting
I Just Started Using R. I Am Supposed to Calculate a New Variable “Vehic_Vol” from the Sum of “Psgr_Vol” and “Lugg_Vol” and Plot This New Variable Against...
I just started using R. I am supposed to Calculate a new variable “Vehic_vol” from the sum of “Psgr_Vol” and “Lugg_Vol” and Plot this new variable against “CITY_MPG” for the whole data set but I end up with 'x' and 'y' lengths differ ERROR! Any thoughts?
Here is what I did:
Vehic_vol<-(VehicleData$Psgr_Vol + VehicleData$Lugg_Vol)
plot (VehicleData$Vehic_vol, VehicleData$CITY_MPG)
Error in xy.coords(x, y, xlabel, ylabel, log) :
'x' and 'y' lengths differ
2 Answers
From the code you provided, Vehic_vol is not a column of VehicleData. If you enter in
VehicleData$Vehic_vol
it returns
NULL
Note that NULL and VehicleData$CITY_MPG have different lengths (use length() to verify that).
Try this instead
plot (Vehic_vol, VehicleData$CITY_MPG)
or
VehicleData$Vehic_vol <- (VehicleData$Psgr_Vol + VehicleData$Lugg_Vol)
plot (VehicleData$Vehic_vol, VehicleData$CITY_MPG)
For Example, my dataset,
mod.2 <- lm(CEC ~ clay + ExchNa + ExchCa,
data = subs.soil.data)
when you write a model like this and want to draw this modela plot,
plot(mod.2$y, mod.2$fitted.values)
this is error "Error in xy.coords(x, y, xlabel, ylabel, log) :
'x' and 'y' lengths differ"
--First, check with length ()
length(mod.2$y)
[1] 0
As you can see, the dependent variable y is 0 in length, i.e. it doesn't exist.
Solution
mod.2 <- lm (CEC ~ clay + ExchNa + ExchCa, data = subs.soil.data, y = TRUE, x = TRUE)
We did not define x and y in the previous formula for mod.2, and this is the cause of the error.
plot(mod.2$y, mod.2$fitted.values)
> length(mod.2$y)
[1] 146
> length(mod.2$fitted.values)
[1] 146
>
This problem has now disappeared.
Chloe Bennett explores the intersection of pop culture, streaming entertainment, digital trends, and contemporary lifestyle. Her weekly commentary reaches thousands of culture enthusiasts.
