CODEWITHSUNDEEP
rplot
Nicola Gambaro
Nicola Gambaro

Reputation: 53

How to make the y-axis start from 0 in BaseR if we don't know the upper value

I have an automatically generated plot as below. 1 I would like to force the y-axis of the BaseR plot to always start from 0. I can't use ylim because I don't know what the upper value is, as it changes depending on the output of the model run.

Sample output dataset:

dput(output)
structure(c(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 
15, 16, 17, 18, 19, 20, 50, 69.3156953492534, 69.318942246502, 
69.3221842690373, 69.3254213876886, 69.328653593418, 69.3318808298525, 
69.3351031300752, 69.3383203643342, 69.3415326399219, 69.3447398445571, 
69.347942054021, 69.3511390646152, 69.3543309965411, 69.3575177870547, 
69.3606994090412, 69.3638758413145, 69.3670470505769, 69.3702130227672, 
69.3733737166025, 69.3765291188801, 5000, 18862.7067825912, 32701.2878238389, 
46515.4231109193, 60305.1557762178, 74070.5350235935, 87811.6110650452, 
101528.431040477, 115221.04114851, 128889.487348218, 142533.821290191, 
156154.07212382, 169750.309580026, 183322.569810166, 196870.894746817, 
210395.328060903, 223895.908282952, 237372.694773718, 250825.703835891, 
264254.993125685, 277660.610657547, 2, 2.13669838484446, 2.1371918659313, 
2.13768517063436, 2.13817826875458, 2.1386711454299, 2.13916374738259, 
2.13965609413379, 2.14014807364301, 2.14063976569378, 2.14113107150291, 
2.14162204800553, 2.14211251951205, 2.14260257795796, 2.14309216606161, 
2.14358125521914, 2.14406982238996, 2.14455783154718, 2.14504526882503, 
2.1455320920089, 2.14601828305136, 200, 200.222037812752, 200.45059302352, 
200.679119601703, 200.907601138121, 201.136029483869, 201.364375754764, 
201.59265036992, 201.820792720557, 202.04884578298, 202.276756080509, 
202.504554314939, 202.732145381519, 202.959578907475, 203.18682382934, 
203.413864602637, 203.640688692808, 203.867276503349, 204.09362050977, 
204.319697782116, 204.545498454914), .Dim = c(21L, 5L), .Dimnames = list(
    NULL, c("time", "w", "x", "y", "z")), istate = c(2L, 111L, 
231L, NA, 3L, 3L, 0L, 84L, 24L, NA, NA, NA, NA, 9L, 2L, 2L, NA, 
NA, NA, NA, NA), rstate = c(1, 1, 20.9107964764918, 0, 0.00162452941396683
), lengthvar = 4L, class = c("deSolve", "matrix"), type = "lsoda")

Currently, running plot(output) with this deSolve object after using par(oma = c(0, 0, 3, 0)) creates four plots of the four variables on the same screen. However, it automatically chooses ylim values. I would like all four of these plots to start from 0.

Upvotes: 0

Views: 869

Answers (1)

Pedro Alencar
Pedro Alencar

Reputation: 1089

You can pass a ylim input to set the limits of the axis. If you don't know the upper limit use max(y).

x <- 1:1000
y <- 500 + 100*sin(x/10)

plot(x,y, 'l', ylim = c(0,max(y)))

Upvotes: 2

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