[R] Alpha not working in geom_rect

[Jim Lemon]

Hi Adel,
Almost certainly because the device you were using doesn't support
transparency.Try it with a PDF device and check the resulting file in a PDF
reader:

pdf("ad.pdf")
print(p)
dev.off()

Jim


On Sun, Mar 8, 2015 at 4:39 AM, Adel <adel.daoud at socav.gu.se> wrote:

> Hi
> I am trying to activate the alpha argument to work, but for some reason it
> does not to play with me. Anybody has an idea why?
>
>
> p <- ggplot(data = prediction_df, aes(x=x, y=prediction, fill=threshold)) +
> geom_area(colour="black", size=.2, alpha=.4) +
> scale_fill_brewer(palette="Set1",
> breaks=rev(levels(prediction_df$threshold)))
> p + geom_rect(aes(xmin=2, xmax=10, ymin=(0), ymax=(1)), fill="black",
> alpha=0.5)
>
>
> prediction_df
>      x prediction  threshold
> 1  -10  0.5694161       noAF
> 2   -9  0.5700513       noAF
> 3   -8  0.5706863       noAF
> 4   -7  0.5713211       noAF
> 5   -6  0.5719556       noAF
> 6   -5  0.5725899       noAF
> 7   -4  0.5732240       noAF
> 8   -3  0.5738578       noAF
> 9   -2  0.5744914       noAF
> 10  -1  0.5751247       noAF
> 11   0  0.5757578       noAF
> 12   1  0.5763906       noAF
> 13   2  0.5770232       noAF
> 14   3  0.5776556       noAF
> 15   4  0.5782876       noAF
> 16   5  0.5789195       noAF
> 17   6  0.5795510       noAF
> 18   7  0.5801823       noAF
> 19   8  0.5808134       noAF
> 20   9  0.5814441       noAF
> 21  10  0.5820747       noAF
> 22 -10  0.2359140   singleAF
> 23  -9  0.2356847   singleAF
> 24  -8  0.2354550   singleAF
> 25  -7  0.2352249   singleAF
> 26  -6  0.2349943   singleAF
> 27  -5  0.2347634   singleAF
> 28  -4  0.2345321   singleAF
> 29  -3  0.2343003   singleAF
> 30  -2  0.2340682   singleAF
> 31  -1  0.2338356   singleAF
> 32   0  0.2336027   singleAF
> 33   1  0.2333694   singleAF
> 34   2  0.2331357   singleAF
> 35   3  0.2329016   singleAF
> 36   4  0.2326671   singleAF
> 37   5  0.2324322   singleAF
> 38   6  0.2321969   singleAF
> 39   7  0.2319613   singleAF
> 40   8  0.2317253   singleAF
> 41   9  0.2314889   singleAF
> 42  10  0.2312522   singleAF
> 43 -10  0.1946699 multipleAF
> 44  -9  0.1942640 multipleAF
> 45  -8  0.1938587 multipleAF
> 46  -7  0.1934540 multipleAF
> 47  -6  0.1930500 multipleAF
> 48  -5  0.1926467 multipleAF
> 49  -4  0.1922440 multipleAF
> 50  -3  0.1918419 multipleAF
> 51  -2  0.1914404 multipleAF
> 52  -1  0.1910397 multipleAF
> 53   0  0.1906395 multipleAF
> 54   1  0.1902400 multipleAF
> 55   2  0.1898411 multipleAF
> 56   3  0.1894429 multipleAF
> 57   4  0.1890453 multipleAF
> 58   5  0.1886483 multipleAF
> 59   6  0.1882520 multipleAF
> 60   7  0.1878564 multipleAF
> 61   8  0.1874613 multipleAF
> 62   9  0.1870669 multipleAF
> 63  10  0.1866732 multipleAF
>
>
>
>
>
> --
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>
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