Wrong parentheses for graph code

[Eli Omo]

Hi everyone,

I intent to add my calculated confidence intervals to my graph:

This is the code for the initial graph.

graph twoway (connected systolicdifference bpweeks) if inrange(bpweeks,20,40), by (ETHNICITY)

I intended to add the confidence interval to the graph with this code but the parenthesis seems to be wrong . Could you help me identify where I went wrong.

graph twoway (connected systolicdifference bpweeks) if inrange(bpweeks,20,40), by (ETHNICITY)
(rcap upperboundsofci lowerboundsofci bpweeks if inrange(bpweeks,20,40),by (EHTNICITY))

Thank you very much

[Nick Cox]

You don't give a data example or error message.

There seem to be at least two problems, one that your if qualifier is placed wrongly in one case, and the other in spelling a variable name.

I am not comfortable with the () notation for superimposing graph commands, so I will use the || notation, which I find easier to read.

You could repeat by(ETHNICITY) but that is not needed.

This should get you closer.

  
 graph twoway connected systolicdifference bpweeks if inrange(bpweeks,20,40), by(ETHNICITY) ||  rcap upperboundsofci lowerboundsofci bpweeks if inrange(bpweeks,20,40)

[Eli Omo]

Thank you very much removing using the | I notion worked.