Add transparency to GoogleMap plot (loa package)

Add transparency to GoogleMap plot (loa package)

By : reallulo
Date : November 18 2020, 03:49 PM
it helps some times I thought I might do it with 8 digit hexmode, but Roman was right.
png(); print( GoogleMap(z ~ lat*lon,col.regions=list("yellow","red"), alpha.regions=list(alpha=.5, alpha=.5) ,panel=panel.contourplot) );dev.off()
code :

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GoogleMap inside of a Fragment in a ViewPager, keep all touch events in the GoogleMap

GoogleMap inside of a Fragment in a ViewPager, keep all touch events in the GoogleMap

By : SebDev
Date : March 29 2020, 07:55 AM
seems to work fine The solution was to create a custom ViewPager with an override of the canScroll method and use that in my xml. The canScroll method is passed a tree of child views recursively and then decides if the View is allowed to handle the horizontal scrolling or if it should be captured by the parent ViewPager
code :
public class MyViewPager extends ViewPager {

    public MyViewPager (Context context) {

    public MyViewPager (Context context, AttributeSet attrs) {
        super(context, attrs);

    protected boolean canScroll(View v, boolean checkV, int dx, int x, int y) {
        // Not satisfied with this method of checking...
        // working on a more robust solution
        if(v.getClass().getName().equals("maps.j.b")) {
            return true;
        return super.canScroll(v, checkV, dx, x, y);

    android:layout_weight="1" />
Correct usage of GoogleMap() command in loa package (R)

Correct usage of GoogleMap() command in loa package (R)

By : Parth Dalal
Date : March 29 2020, 07:55 AM
hope this fix your issue Sorry for only seeing this now/replying late.
First a quick suggestion: Just be helpful to know where Y and X are coming from and how you made map for...
code :
# not ...map=MapVeneto
loaPlot(volcano, panel=panel.binPlot)
# etc 
GoogleMap(zinc~latitude*longitude, data=lat.lon.meuse, size=c(480,480)) 
map <- getMapArg()
GoogleMap(zinc~latitude*longitude, data=lat.lon.meuse, map=map)
map <- GetMap(center=c(lat=50.97494,lon=5.743606), zoom=13,size=c(480,480))
GoogleMap(zinc~latitude*longitude, data=lat.lon.meuse, map=map)
install.packages("loa", repos="http://R-Forge.R-project.org")
GoogleMap(zinc~latitude*longitude, data=lat.lon.meuse, size=c(480,480))
  lat <- lat.lon.meuse$latitude
  lon <- lat.lon.meuse$longtitude
  map <- makeMapArg(y=lat, x=lon, size=c(480, 480))
  GoogleMap(zinc~latitude*longitude, data=lat.lon.meuse, map=map)
plot marker in googlemap from json data android

plot marker in googlemap from json data android

By : Nemanja Kutlesic
Date : March 29 2020, 07:55 AM
like below fixes the issue You need to reconstruct your code to work correctly.
You need to put your async task returning an object with the data you need in onPostExecute function.
Gather markers by clusters using R googlemap package

Gather markers by clusters using R googlemap package

By : hunt
Date : March 29 2020, 07:55 AM
like below fixes the issue A bug was found in the latest release version (v2.4) on CRAN which broke the clustering.
I've issued a fix in the development version (v2.5+), which you can install with
code :
# library(devtools)
key <- "map_key"

df <- data.frame(
    lat = c(45.77740319999999,45.77740319999999,46.77740319999999,46.77740319999999),
    lon = c(4.855214400000023,4.955214400000023,4.855214400000023,4.955214400000023)

google_map(key = key, height = 600, search_box = T) %>% 
    add_markers(data = df,cluster = TRUE)
Compose a plot with an image and a plot of a datafile matrix with transparency

Compose a plot with an image and a plot of a datafile matrix with transparency

By : Azeez Segun Shittu
Date : March 29 2020, 07:55 AM
may help you . When you plot ... matrix with image the image values are in the third column, not in the first. Here is a solution that plots that map in (x,y) coordinate system and your data in the (x2,y2) coordinate system. This way you rescale the latter relative to the former simply by setting x2range and y2range:
code :
set size square
set xtics nomirror
set ytics nomirror
set x2tic
set y2tic
set x2range [-1:200]
set y2range [-1:204] reverse
set autoscale noextend
set cbrange [0:9]
plot 'ghent0.jpg' binary filetype=jpg with rgbimage, \
     'pher.txt' matrix using 1:2:($3 == 0 ? NaN : $3) axes x2y2 with image notitle
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