evap.df: Moisture evaporation data

In R330: An R package for Stats 330

Description

The purpose was to see if the amount of evaporation could be predicted by the temperature humidity and wind speed

Usage

data(evap.df)

Format

A data frame with 46 observations on the following 11 variables:

avst

average soil temperature over 24 hour period (x10)

minst

minimum soil temperature over 24 hour period (x10)

maxst

maximum soil temperature over 24 hour period (x10)

avat

average air temperature over 24 hour period (x10)

minat

minimum air temperature over 24 hour period (x10)

maxat

maximum air temperature over 24 hour period (x10)

avh

average humidity over 24 hour period (x10)

minh

minimum humidity over 24 hour period (x10)

maxh

maximum humidity over 24 hour period (x10)

wind

average wind speed over a 24 hour period (x100)

evap

amount of evaporation over 24 hour period

Examples

data(evap.df)
evap.lm<-lm(evap~avat+avh+wind,data=evap.df)
summary(evap.lm)

Example output

Loading required package: s20x
Loading required package: leaps
Loading required package: rgl
Loading required package: lattice
Warning messages:
1: In rgl.init(initValue, onlyNULL) : RGL: unable to open X11 display
2: 'rgl_init' failed, running with rgl.useNULL = TRUE 
3: .onUnload failed in unloadNamespace() for 'rgl', details:
  call: fun(...)
  error: object 'rgl_quit' not found 

Call:
lm(formula = evap ~ avat + avh + wind, data = evap.df)

Residuals:
    Min      1Q  Median      3Q     Max 
-31.343  -2.032   2.160   4.768  14.630 

Coefficients:
              Estimate Std. Error t value Pr(>|t|)    
(Intercept) -43.822649 128.616172  -0.341    0.735    
avat          2.086122   0.303887   6.865 2.27e-08 ***
avh          -1.198666   1.286493  -0.932    0.357    
wind          0.009861   0.010383   0.950    0.348    
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Residual standard error: 10.21 on 42 degrees of freedom
Multiple R-squared:  0.5457,	Adjusted R-squared:  0.5132 
F-statistic: 16.81 on 3 and 42 DF,  p-value: 2.528e-07

R330 documentation built on May 2, 2019, 2:12 p.m.