Error Bar Charts Stata
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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: st: Adding error bars to bar chart From Nick Cox
Stata Bar Graph With Error Bars
bars to bar chart Date Tue, 4 Mar 2014 17:25:58 +0000 I don'f standard error stata think anyone quite recommends that as the method of choice, but it is one possibility. Much depends on generally, quite what standard deviation stata you want or need to show specifically, whether your SEs are necessarily calculated separately or are just SD/sqrt(sample size) and as such can be calculated by some existing command and whether you +/- SE or
Variance Stata
some confidence interval. Nick njcoxstata@gmail.com On 4 March 2014 16:39, Chris Yang
Normal Distribution Stata
do that" for reasons developed >> (e.g.) in the thread starting >> >> http://www.stata.com/statalist/archive/2013-05/msg00293.html >> >> and its references. >> >> A less cryptic comment would be that this almost always (1) >> over-reduces the data (2) places most emphasis where it is least >> appropriate (3) is more difficult to interpret than easy alternatives. >> >> There is no difficulty in principle, except that if you think the >> place to start is -graph bar- that is quite wrong. You would need to >> start with -twoway bar- and then add other -twoway- elements. By the >> same token, you would need to calculate everything you need as >> variables before you enter -twoway-. >> >> Nick >> njcoxstata@gmail.com >> >> On 4 March 2014 15:09, Chris Yang
30 Jun 2003 14:43:13 +0100 Stephen McKay > I'm no expert but isn't > > twoway bar mean xcatvar || rcap upper lower xcatvar > > most of what you need? Overlaying mean stata a bar plot with capped spikes. > Stephen is quite correct. As I
Z Score Stata
pointed out in a previous thread earlier in the month started by Buzz Burhans: > It so happens that Stata's coefficient of variation stata been a bit laggard on producing > wrapper commands for plots showing error bars. > I doubt there's any policy there. > However, having implemented various high- > level commands in one http://www.stata.com/statalist/archive/2014-03/msg00096.html way does inhibit twisting > them in a different direction. -graph bar- > for example is basically built around a -collapse- > of the data. Building something else major on top of > that, such as machinery for adding confidence > intervals generally, would be, I guess, rather tricky. My posting then focused on my criticisms of a certain kind of error bar plot, and Buzz's http://www.stata.com/statalist/archive/2003-06/msg00631.html reply focused on his reaction to that critique. I don't think either of us convinced the other. However, what is said above for -graph bar- does not inhibit building something based on -graph twoway bar-, and you can try your own wrapper command. Here is a "no holds barred" (no bars held?) plot, error bars on top of thicker bars. You have to supply 1. bar height variable 2. upper error bar position variable 3. lower error bar position variable 4. other axis variable *! NJC 1.0.0 30jun2003 program baronbar version 8 syntax varlist(min=4 max=4) [if] [in] [, /// HORizontal VERTical base(str) BARWidth(str) /// BSTYle(str) BColor(str) BFColor(str) /// BLSTYle(str) BLColor(str) BLWidth(str) /// BLPattern(str) plot(str asis) * /// ] tokenize `varlist' args height upper lower groupvar local yttl : var label `height' if `"`yttl'"' == "" local yttl `height' if `"`plot'"' == "" local legend legend(nodraw) foreach o in /// base barwidth bstyle bcolor bfcolor /// blstyle blcolor blwidth blpattern { if `"``o''"' != "" local baropts "`baropts' `o'(``o'')" } graph twoway /// (bar `height' `groupvar' /// `if' `in', /// ytitle(`"`yttl'"') /// `horizontal' /// `vertical' /// `baropts' /// ) /// (rcap `upper' `lower' `groupvar' /
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