# Tukey's test tukey <- TukeyHSD(anova) print(tukey) # Tukey multiple comparisons of means
#Rcode to construct a bar plot download#
To reproduce the results, you can download the file GTL.csv. The data 1 presents the results of an experiment conducted to study the influence of the operating temperature (100˚C, 125˚C and 150˚C) and three faceplate glass types (A, B and C) in the light output of an oscilloscope tube.
build a table with the summarised data: mean, standard deviation and cldĪt the end of the tutorial you will also find examples of barplots and scatterplots for the final presentation of the results. obtain the compact letter display (cld) to indicate significant differences. perform analysis of variance and Tukey’s test. create a simple plot for the data visualisation. In this tutorial, we are going to analyse the results of a two-factor factorial design using analysis of variance (ANOVA). Plots for the final presentation of the results. Compact letter display to indicate significant differences. Creating a table with factors, means and standard deviation. Analysis of variance for two factors – Two-Way ANOVA. 
Creating a simple plot for data visualisation.
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