How to make impulse response lines an area

[tony]

Hi there,
I did a VAR model and obtained the IRF lines, and I want to make a confidence area and an estimated line.
How to do that?
Thanks.

[EViews Matt]

Hello,

Is the issue that the confidence lines are not being shown or that you want the area between the confidence lines to be filled?

[tony]

Hello,

Is the issue that the confidence lines are not being shown or that you want the area between the confidence lines to be filled?

Yes, I want the area between the confidence lines to be filled.

[EViews Matt]

Unfortunately, I'm not aware of a simple way to accomplish what you want. I've reworked an old example of mine to show how you could create a graph with a filled area band for the confidence interval. This example is probably overkill, but it demonstrates the core task of creating a mixed type graph. The mixed graph then includes, at least, a band area element for the confidence interval and a line element for the response proper.

Code: Select all

' Generate example data create u 100 series x = rnd series y = nrnd series z = nrnd var v.ls 1 2 x y z ' Generate impulse data v.impulse(20,m,se=a,matbyr=irf_data) ' Create individual graphs for each IRF for !i = 1 to irf_data.@cols vector irf = @columnextract(irf_data, !i) vector se = @columnextract(irf_data_se, !i) matrix m = @hcat(@hcat(@hcat(irf - se, irf + se), @hcat(irf - se, irf + se)), irf) freeze(gr!i) m.mixed band(1, 2) line(3, 4, 5) gr!i.setelem(1) fillcolor(@rgb(238,196,162)) gr!i.setelem(1) linecolor(@rgb(218, 124, 48)) linepattern(2) gr!i.setelem(2) linecolor(@rgb(218, 124, 48)) linepattern(2) gr!i.setelem(3) linecolor(@rgb(57, 106, 177)) linepattern(1) gr!i.options linepat gr!i.legend -display next ' Alter vertical axes so that each variable uses the same scale. for !i = 1 to irf_data.@cols step v.@neqn !min = gr!i.@axismin("l") !max = gr!i.@axismax("l") for !j = !i + 1 to !i + v.@neqn - 1 if gr!j.@axismin("l") < !min then !min = gr!j.@axismin("l") endif if gr!j.@axismax("l") > !max then !max = gr!j.@axismax("l") endif next for !j = !i to !i + v.@neqn - 1 gr!j.axis("l") range(!min, !max) next next ' Combine all individual graphs and display. %all_graphs = @wlookup("gr*") graph gr.merge {%all_graphs} show gr ' Cleanup. delete irf* se m gr?*