Calcule les coordonnées des points d'un cercle (Generate circle coordinates)

Generate coordinates to draw a circle.

funcCircleCoords(center = c(0, 0), r = 1, npoints = 100)

Source

Adapted from Joran's response to https://stackoverflow.com/questions/6862742/draw-a-circle-with-ggplot2.

Arguments

center

coordinate for centroid

r

radius

npoints

number of coordinates to generate

Value

a dataframe

Examples

funcCircleCoords(c(1,2),1)
#>                x        y
#> 1   2.0000000000 2.000000
#> 2   1.9979866765 2.063424
#> 3   1.9919548128 2.126592
#> 4   1.9819286973 2.189251
#> 5   1.9679487014 2.251148
#> 6   1.9500711177 2.312033
#> 7   1.9283679330 2.371662
#> 8   1.9029265383 2.429795
#> 9   1.8738493771 2.486197
#> 10  1.8412535328 2.540641
#> 11  1.8052702575 2.592908
#> 12  1.7660444431 2.642788
#> 13  1.7237340381 2.690079
#> 14  1.6785094116 2.734592
#> 15  1.6305526671 2.776146
#> 16  1.5800569096 2.814576
#> 17  1.5272254676 2.849725
#> 18  1.4722710748 2.881453
#> 19  1.4154150130 2.909632
#> 20  1.3568862216 2.934148
#> 21  1.2969203753 2.954902
#> 22  1.2357589355 2.971812
#> 23  1.1736481777 2.984808
#> 24  1.1108381999 2.993838
#> 25  1.0475819158 2.998867
#> 26  0.9841340362 2.999874
#> 27  0.9207500431 2.996855
#> 28  0.8576851617 2.989821
#> 29  0.7951933319 2.978802
#> 30  0.7335261863 2.963842
#> 31  0.6729320367 2.945001
#> 32  0.6136548743 2.922354
#> 33  0.5559333874 2.895994
#> 34  0.5000000000 2.866025
#> 35  0.4460799361 2.832570
#> 36  0.3943903129 2.795762
#> 37  0.3451392661 2.755750
#> 38  0.2985251123 2.712694
#> 39  0.2547355503 2.666769
#> 40  0.2139469053 2.618159
#> 41  0.1763234186 2.567060
#> 42  0.1420165868 2.513677
#> 43  0.1111645513 2.458227
#> 44  0.0838915426 2.400931
#> 45  0.0603073792 2.342020
#> 46  0.0405070264 2.281733
#> 47  0.0245702131 2.220311
#> 48  0.0125611113 2.158001
#> 49  0.0045280774 2.095056
#> 50  0.0005034576 2.031728
#> 51  0.0005034576 1.968272
#> 52  0.0045280774 1.904944
#> 53  0.0125611113 1.841999
#> 54  0.0245702131 1.779689
#> 55  0.0405070264 1.718267
#> 56  0.0603073792 1.657980
#> 57  0.0838915426 1.599069
#> 58  0.1111645513 1.541773
#> 59  0.1420165868 1.486323
#> 60  0.1763234186 1.432940
#> 61  0.2139469053 1.381841
#> 62  0.2547355503 1.333231
#> 63  0.2985251123 1.287306
#> 64  0.3451392661 1.244250
#> 65  0.3943903129 1.204238
#> 66  0.4460799361 1.167430
#> 67  0.5000000000 1.133975
#> 68  0.5559333874 1.104006
#> 69  0.6136548743 1.077646
#> 70  0.6729320367 1.054999
#> 71  0.7335261863 1.036158
#> 72  0.7951933319 1.021198
#> 73  0.8576851617 1.010179
#> 74  0.9207500431 1.003145
#> 75  0.9841340362 1.000126
#> 76  1.0475819158 1.001133
#> 77  1.1108381999 1.006162
#> 78  1.1736481777 1.015192
#> 79  1.2357589355 1.028188
#> 80  1.2969203753 1.045098
#> 81  1.3568862216 1.065852
#> 82  1.4154150130 1.090368
#> 83  1.4722710748 1.118547
#> 84  1.5272254676 1.150275
#> 85  1.5800569096 1.185424
#> 86  1.6305526671 1.223854
#> 87  1.6785094116 1.265408
#> 88  1.7237340381 1.309921
#> 89  1.7660444431 1.357212
#> 90  1.8052702575 1.407092
#> 91  1.8412535328 1.459359
#> 92  1.8738493771 1.513803
#> 93  1.9029265383 1.570205
#> 94  1.9283679330 1.628338
#> 95  1.9500711177 1.687967
#> 96  1.9679487014 1.748852
#> 97  1.9819286973 1.810749
#> 98  1.9919548128 1.873408
#> 99  1.9979866765 1.936576
#> 100 2.0000000000 2.000000
plot(funcCircleCoords(c(1,2),1))