R (3) Introduction to Graphics. The main guide R in Action Data Analysis and Graphics with R Robert I. Kabacoff

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Presentation transcript:

R (3) Introduction to Graphics

The main guide R in Action Data Analysis and Graphics with R Robert I. Kabacoff

Simple plot Evolution of daily sales in August 2011 (data imported from Pg) > plot(daily_sales_2011_8$day, + daily_sales_2011_8$sales, type="b")

Parameters for symbols and lines

Plot with symbol and line Evolution of daily sales in August 2011 (data imported from Pg) > plot(daily_sales_2011_8$day, + daily_sales_2011_8$sales, + type="b", + lty=2, + pch=17)

Plot with symbol,line and different symbol size Evolution of daily sales in August 2011 (data imported from Pg) > plot(daily_sales_2011_8$day, + daily_sales_2011_8$sales, + type="b", + lty=2, + pch=17, + cex =.5)

Parameters for color

Plot with colour > plot(daily_sales_2011_8$day, + daily_sales_2011_8$sales, + type="b", + lty=2, + pch=17, + cex =.5, + col="brown", + col.axis= + "green", + col.lab= + "red", + fg="blue", + bg="yellow")

Parameters for text s& dimensions/margins

Parameters for text & dimensions/margins

Change axes limits > plot(daily_sales_2011_8$day,daily_sales_2011_8$sales/ , xlim=c(min(daily_sales_2011_8$day), + max(daily_sales_2011_8$day)), ylim=c(0, + max(daily_sales_2011_8$sales/1000)+1000), + type="b", + cex =.5, + col="red", + lty=2, + pch=2, + lwd=2)

Titles (1) Types of titles – Main title of the graphic ( main ) – Sub-title of the graphic ( sub ) – Title of the axis x and y ( xlab and ylab ) > title(main="main title", + sub="sub-title", + xlab="x-axis label", + ylab="y-axis label")

Titles (2) > plot(dday, sales/1000, main= "Daily Sales in + August 2011", sub="Data imported from + PostgreSQL", xlab="Day (of the month)", + ylab="Sales (thousands)", + type="b", + cex =.5, + col="red", + lty=2, + pch=2, + lwd=2)

Legend (1) > attach(daily_sales_2011_8) > plot(day, sales/1000, main="Daily Sales - Aug. vs. Sept. 2011", sub="Data imported from PostgreSQL", xlab="Day (of the month)", ylab="Sales(thousands)", type="b", cex = 1.25, col="red", lty=1, pch=2, lwd=1.5) > detach(daily_sales_2011_8) > attach(daily_sales_2011_9) > # to display on the same graphic, use lines, not plot > lines(day, sales/1000, col="black", lty=2, + pch=17, lwd=2) # now the legend legend("bottomright", inset=.05, title="Month", + c("Aug","Sept"), + lty=c(1, 2), pch=c(2, 17), col=c("red", "black"))

Legend (2)