Compute the receiver operating characteristic (ROC) curve.

Description

This function computes the receiver operating characteristic (ROC) curve required for the auc function and the plot function.

Usage

  roc(predictions, labels)

Arguments

Value

A list containing the following elements:

Author(s)

Authors: Michel Ballings and Dirk Van den Poel, Maintainer: Michel.Ballings@UGent.be

References

Ballings, M., Van den Poel, D., Threshold Independent Performance Measures for Probabilistic Classifcation Algorithms, Forthcoming.

See Also

sensitivity, specificity, accuracy, roc, auc, plot

Examples

data(churn)

roc(churn$predictions,churn$labels)

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(AUC)
AUC 0.3.0
Type AUCNews() to see the change log and ?AUC to get an overview.
> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/AUC/roc.Rd_%03d_medium.png", width=480, height=480)
> ### Name: roc
> ### Title: Compute the receiver operating characteristic (ROC) curve.
> ### Aliases: roc
> 
> ### ** Examples
> 
> data(churn)
> 
> roc(churn$predictions,churn$labels)
$cutoffs
  [1] 1.000 1.000 0.972 0.968 0.964 0.960 0.932 0.910 0.908 0.902 0.896 0.890
 [13] 0.882 0.878 0.866 0.862 0.856 0.840 0.812 0.800 0.784 0.770 0.760 0.758
 [25] 0.750 0.748 0.740 0.734 0.714 0.712 0.698 0.694 0.682 0.676 0.672 0.664
 [37] 0.650 0.648 0.636 0.612 0.596 0.592 0.586 0.568 0.564 0.556 0.544 0.542
 [49] 0.534 0.504 0.500 0.492 0.474 0.472 0.458 0.442 0.436 0.430 0.428 0.426
 [61] 0.416 0.410 0.406 0.392 0.390 0.388 0.378 0.376 0.374 0.372 0.366 0.364
 [73] 0.362 0.360 0.356 0.354 0.352 0.348 0.342 0.336 0.334 0.330 0.326 0.324
 [85] 0.316 0.312 0.310 0.304 0.300 0.298 0.294 0.290 0.286 0.284 0.282 0.278
 [97] 0.276 0.274 0.268 0.266 0.264 0.262 0.260 0.258 0.256 0.254 0.252 0.250
[109] 0.248 0.246 0.244 0.242 0.236 0.232 0.230 0.228 0.224 0.222 0.216 0.214
[121] 0.212 0.208 0.206 0.204 0.202 0.200 0.198 0.196 0.192 0.190 0.188 0.186
[133] 0.182 0.178 0.176 0.172 0.170 0.168 0.162 0.160 0.158 0.156 0.154 0.152
[145] 0.150 0.148 0.146 0.144 0.142 0.140 0.138 0.136 0.134 0.132 0.130 0.128
[157] 0.126 0.124 0.122 0.120 0.118 0.116 0.114 0.112 0.110 0.108 0.106 0.104
[169] 0.102 0.100 0.098 0.096 0.094 0.092 0.090 0.088 0.086 0.084 0.082 0.080
[181] 0.078 0.076 0.074 0.072 0.070 0.068 0.066 0.064 0.062 0.060 0.058 0.056
[193] 0.054 0.052 0.050 0.048 0.046 0.044 0.042 0.040 0.038 0.036 0.034 0.032
[205] 0.030 0.028 0.026 0.024 0.022 0.020 0.018 0.016 0.014 0.012 0.010 0.008
[217] 0.006 0.004 0.002 0.000

$fpr
  [1] 0.000000000 0.002624672 0.003499563 0.003499563 0.003499563 0.003499563
  [7] 0.004374453 0.004374453 0.005249344 0.005249344 0.005249344 0.006124234
 [13] 0.006999125 0.006999125 0.007874016 0.007874016 0.007874016 0.007874016
 [19] 0.008748906 0.008748906 0.008748906 0.008748906 0.010498688 0.011373578
 [25] 0.012248469 0.013123360 0.013123360 0.013123360 0.013123360 0.013998250
 [31] 0.014873141 0.015748031 0.015748031 0.016622922 0.016622922 0.017497813
 [37] 0.019247594 0.020122485 0.021872266 0.023622047 0.024496938 0.024496938
 [43] 0.024496938 0.024496938 0.024496938 0.025371829 0.026246719 0.027121610
 [49] 0.027996500 0.028871391 0.029746282 0.029746282 0.031496063 0.032370954
 [55] 0.033245844 0.034120735 0.034995626 0.034995626 0.034995626 0.034995626
 [61] 0.034995626 0.035870516 0.035870516 0.036745407 0.041994751 0.042869641
 [67] 0.042869641 0.043744532 0.044619423 0.046369204 0.047244094 0.047244094
 [73] 0.048118985 0.048118985 0.048993876 0.050743657 0.050743657 0.053368329
 [79] 0.053368329 0.053368329 0.054243220 0.055118110 0.055118110 0.055993001
 [85] 0.056867892 0.056867892 0.057742782 0.059492563 0.060367454 0.061242345
 [91] 0.062117235 0.062992126 0.063867017 0.064741907 0.065616798 0.069116360
 [97] 0.069991251 0.071741032 0.076990376 0.079615048 0.080489939 0.080489939
[103] 0.080489939 0.081364829 0.084864392 0.085739283 0.093613298 0.093613298
[109] 0.097112861 0.097987752 0.100612423 0.102362205 0.103237095 0.104986877
[115] 0.104986877 0.105861767 0.107611549 0.110236220 0.111111111 0.111986002
[121] 0.112860892 0.112860892 0.113735783 0.114610674 0.116360455 0.117235346
[127] 0.117235346 0.118985127 0.119860017 0.121609799 0.124234471 0.125984252
[133] 0.126859143 0.127734033 0.128608924 0.132108486 0.133858268 0.134733158
[139] 0.139107612 0.140857393 0.143482065 0.145231846 0.146106737 0.146981627
[145] 0.152230971 0.154855643 0.156605424 0.158355206 0.161854768 0.164479440
[151] 0.167104112 0.167979003 0.170603675 0.171478565 0.175853018 0.180227472
[157] 0.181977253 0.186351706 0.187226597 0.189851269 0.195100612 0.198600175
[163] 0.199475066 0.200349956 0.202974628 0.206474191 0.209973753 0.211723535
[169] 0.216972878 0.219597550 0.220472441 0.224846894 0.225721785 0.230096238
[175] 0.237095363 0.237095363 0.239720035 0.246719160 0.249343832 0.251968504
[181] 0.257217848 0.260717410 0.261592301 0.265091864 0.269466317 0.276465442
[187] 0.281714786 0.286089239 0.287839020 0.292213473 0.294838145 0.300087489
[193] 0.304461942 0.308836395 0.314085739 0.320209974 0.323709536 0.330708661
[199] 0.334208224 0.337707787 0.342957130 0.346456693 0.352580927 0.356955381
[205] 0.363079615 0.374453193 0.384951881 0.393700787 0.403324584 0.417322835
[211] 0.420822397 0.427821522 0.441819773 0.452318460 0.465441820 0.489063867
[217] 0.523184602 0.559055118 0.619422572 1.000000000

$tpr
  [1] 0.0000000 0.1635220 0.1635220 0.1823899 0.1886792 0.2012579 0.2012579
  [8] 0.2075472 0.2075472 0.2138365 0.2201258 0.2201258 0.2264151 0.2327044
 [15] 0.2327044 0.2389937 0.2452830 0.2515723 0.2515723 0.2578616 0.2641509
 [22] 0.2704403 0.3018868 0.3018868 0.3018868 0.3018868 0.3081761 0.3144654
 [29] 0.3207547 0.3207547 0.3207547 0.3207547 0.3270440 0.3270440 0.3333333
 [36] 0.3333333 0.3333333 0.3333333 0.3333333 0.3333333 0.3333333 0.3396226
 [43] 0.3459119 0.3522013 0.3584906 0.3584906 0.3647799 0.3647799 0.3647799
 [50] 0.3647799 0.3710692 0.3773585 0.3836478 0.3836478 0.3836478 0.3836478
 [57] 0.3836478 0.3899371 0.3962264 0.4025157 0.4150943 0.4150943 0.4213836
 [64] 0.4213836 0.4213836 0.4402516 0.4528302 0.4528302 0.4528302 0.4591195
 [71] 0.4591195 0.4654088 0.4654088 0.4716981 0.4779874 0.4779874 0.4842767
 [78] 0.4842767 0.5031447 0.5094340 0.5094340 0.5157233 0.5220126 0.5220126
 [85] 0.5220126 0.5283019 0.5471698 0.5471698 0.5471698 0.5471698 0.5471698
 [92] 0.5471698 0.5534591 0.5534591 0.5597484 0.5660377 0.5660377 0.5660377
 [99] 0.5660377 0.5660377 0.5660377 0.5723270 0.5786164 0.5786164 0.5849057
[106] 0.5849057 0.5911950 0.6037736 0.6037736 0.6037736 0.6037736 0.6100629
[113] 0.6100629 0.6226415 0.6289308 0.6289308 0.6289308 0.6477987 0.6477987
[120] 0.6477987 0.6477987 0.6540881 0.6540881 0.6603774 0.6603774 0.6603774
[127] 0.6666667 0.6666667 0.6666667 0.6666667 0.6666667 0.6666667 0.6729560
[134] 0.6729560 0.6729560 0.6729560 0.6729560 0.6792453 0.6918239 0.6918239
[141] 0.6981132 0.7044025 0.7106918 0.7106918 0.7169811 0.7169811 0.7169811
[148] 0.7169811 0.7169811 0.7169811 0.7169811 0.7169811 0.7169811 0.7232704
[155] 0.7232704 0.7232704 0.7232704 0.7232704 0.7232704 0.7232704 0.7358491
[162] 0.7358491 0.7358491 0.7358491 0.7484277 0.7484277 0.7484277 0.7547170
[169] 0.7547170 0.7610063 0.7610063 0.7610063 0.7610063 0.7610063 0.7610063
[176] 0.7672956 0.7735849 0.7735849 0.7861635 0.7924528 0.7924528 0.7924528
[183] 0.7987421 0.8050314 0.8113208 0.8176101 0.8238994 0.8238994 0.8238994
[190] 0.8238994 0.8301887 0.8364780 0.8364780 0.8364780 0.8427673 0.8427673
[197] 0.8427673 0.8490566 0.8490566 0.8553459 0.8553459 0.8553459 0.8553459
[204] 0.8553459 0.8553459 0.8553459 0.8616352 0.8742138 0.8805031 0.8867925
[211] 0.8930818 0.8930818 0.8930818 0.8930818 0.8993711 0.9119497 0.9119497
[218] 0.9119497 0.9245283 1.0000000

attr(,"class")
[1] "AUC" "roc"
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>