Tw (scatter marriage divorce, mlabel(state2)) To illustrate, we use census.dta which is installed with Stata. But recently I learned that it also makes the label() suboption redundant. Author Mitch Abdon Posted on 17 February 2011 4 December 2020 Categories Graphics Tags function, graph, marker symbols, twoway 3 Comments on Functions and marker symbols The order() suboption makes label() redundantīefore, I thought that the order() suboption for graphic legend() option is only used to specify which legend keys will be shown and in which order you want them to be displayed. If this were not specified, as in the plot for y = x^2, the plot will be connected by 300 (the default) markers - ugly. What is 'n(#)' for? This tells Stata to draw the plot at 20 points.

In our case, we specified that the new plot type is a connected graph, for which you can specify marker symbols. The recast option will tell Stata to treat the plot as a new plot. Tw function y = x^2, range(-2 2) recast(connected) msymbol(O) || ///įunction y = x^3, range(-2 2) recast(connected) msymbol(T) n(20) || ///įunction y = x^4, range(-2 2) recast(connected) msymbol(S) n(20) /// For example:įunction y = x^3, range(-2 2) lpattern(-) || ///įunction y = x^4, range(-2 2) lpattern(.-) ///Ĭols(3) pos(5) ring(0) region(lcolor(none)))īut suppose you prefer to use marker symbols rather than line patterns to differentiate the line plots, how can you specify this option? Use the recast option (-help advanced_options-):

These options are particularly helpful when you have many functions to plot. Tw function y = 4*x^2, range(-2 2) lcolor(red) lwidth(medthick) lpattern(-) For example, if you want to change the color, width, and pattern of the line use lcolor, lwidth, and lpattern options: It is easy to change the line attributes of the plot. If you want to draw the other side of the parabola or change the range, you can specify the range as follows: The default is that the function is drawn over the range. For example, the half of a parabola with the equation y = x^2 can be drawn by typing: I would like to remove this.Stata's -graph twoway function- draws the line plot of a specified function. *A second, minor question is that I do not understand why the x-axis gets an elipsis (.) when I add the scatteri plot. I have tried adding axis(2) to the text box as an additional argument, but this option is apparently not allowed. It seems better to be able to attach the text to the line using the second y-axis gridpoints.

Of course, I could manually determine this value for the histogram (as I did in this example), but I plan to create a set of these graphs via a loop, such that there are a dozen or so panels. The corresponding lines would instead be: text(1 `median' `'median = $`=string(`median','%6.2f')''', /// Instead of '0.08' which gets my text into the correct location, I would like to use '1', as this is the maximum value of the second y-axis. This is the reason I used the second y-axis in the first place. This produces the desired graph (for the most part*):Īt issue is that I do not know the height of the histogram beforehand. Scatteri 0 `median' 1 `median', recast(line) yaxis(2) /// Twoway hist mpg, start(10) width(5) || /// Here is an example of my issue: sysuse auto However, I cannot seem to add text to this line using the second y-axis coordinates (it instead uses the first y-axis coordinates, even though the object it is labeling is on the second y-axis). To fix this, I am using scatteri with coordinates.īecause I do not know the height of the histogram beforehand, I set the scatteri plot to use a separate y-axis, which I have hidden. I cannot use xline() because the line falls behind the histogram, rather than on top of it. I have a plot of a histogram, to which I would like to add the median.

Add xline stata