Changing p-value when using elrm in r -


i new user r , perform exact logistic regression. have chosen method because dependent variable binary (i.e. 0 failure , 1 success), , have continuous independent variables. have small sample size of n=10. following sample of code have written.

library(elrm) baselinesteps = c(4202, 7244, 4374.6, 2965.6, 4263.5, 1814.1, 3243.1, 3102.9, 4652.5, 6324.9) stepsclass = c(1, 0, 1, 1, 1, 1, 1, 1, 1, 1) const = rep(1,length(stepsclass))  dat = data.frame(pred = baselinesteps, trials = const, success = stepsclass) m.stepsfromsteps = elrm(formula = success/trials ~ pred, interest = ~pred, iter = 22000, dataset = dat, burnin = 2000)

i trying use baseline average steps/day taken subject determine class of recovery pattern fall (0 or 1). however, when run last line elrm implemented (changing nothing), obtain drastically different p-values every time run it. see following:

> m.stepsfromsteps = elrm(formula = success/trials ~pred, interest = ~pred, iter=30000, dataset = dat, burnin=5000) > m.stepsfromsteps$p.values pred  0.16176  > m.stepsfromsteps = elrm(formula = success/trials ~pred, interest = ~pred, iter=30000, dataset = dat, burnin=5000) > m.stepsfromsteps$p.values pred  0.613  > m.stepsfromsteps = elrm(formula = success/trials ~pred, interest = ~pred, iter=30000, dataset = dat, burnin=5000) > m.stepsfromsteps$p.values pred  1  > m.stepsfromsteps = elrm(formula = success/trials ~pred, interest = ~pred, iter=30000, dataset = dat, burnin=5000) > m.stepsfromsteps$p.values pred  0.83056

i have tried dramatically increasing iterations (iter = 50000) burnin, no avail. p-values still drastically change each time run this. have performed 50 exact logistic regressions in same format using different predictors and/or classes, , of them have same issue of producing different p-values each time.

any appreciated.


Comments

Post a Comment

Popular posts from this blog

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m
Read more

javascript - Z-index in d3.js -

i have map , when hover effect on region of map below yellow line , circle, last ones disappear. how can solve problem? http://jsfiddle.net/ot21n9qx/ var arc = g.append("path") .style("fill", "none") .style("stroke", "yellow") .style("stroke-width", 2) .attr("d", "m" + pathorigin[0] + "," + pathorigin[1] + " q" + svgpoint[0] + "," + pathorigin[1] + " " + svgpoint[0] + "," + svgpoint[1]); var circlesize = d3.scale.linear() .domain([0, 0.5, 1]) .range([4, 10, 4]); svg not have z order draws objects in order created. need create path , circle after create highlight regions. here forked fiddle: http://jsfiddle.net/o00fzgaf/1/
Read more