scatter-plot

Given 'n' images in a png/jpeg format and 'n' corresponding coordinates in 2 dimensions (x,y): I would like to plot these images at the given coordinates on a single plot. If I find the images to be too big, I would ideally like to plot them as a smaller/scaled version at the given coordinates. How can i achieve such a plot in R? An example of how such a plot would look is given below: xy <- data.frame(x=runif(10, 0, 100), y=runif(10, 0, 100)) require(png) img <- readPNG(system.file("img", "Rlogo.png", package="png")) thumbnails <- function(x, y, images, width = 0.1*diff(range(x)), height = 0

I am trying to label a scatter/bubble chart I create from matplotlib with entries from a column in a pandas data frame. I have seen plenty of examples and questions related (see e.g. here and here ). Hence I tried to annotate the plot accordingly. Here is what I do: import matplotlib.pyplot as plt import pandas as pd #example data frame x = [5, 10, 20, 30, 5, 10, 20, 30, 5, 10, 20, 30] y = [100, 100, 200, 200, 300, 300, 400, 400, 500, 500, 600, 600] s = [5, 10, 20, 30, 5, 10, 20, 30, 5, 10, 20, 30] users =['mark', 'mark', 'mark', 'rachel', 'rachel', 'rachel', 'jeff', 'jeff', 'jeff', 'lauren',

I´m working with R scatterplot3D and I need to use expression() in labels because I have to use some Greek letters; my question is: is there a way to pull the y.lab name down or write it along the axis (in a diagonal position)? I went to help and packages description but nothing seems to work; thanks in advance for any help Maria library(scatterplot3d) par(mfrow=c(1,1)) A <- c(3,2,3,3,2) B <- c(2,4,5,3,4) D <- c(4,3,4,2,3) scatterplot3d(A,D,B, xlab=expression(paste(x[a],"-",x[b])), ylab=expression(x[a]), zlab=expression(sigma^2)) You can't use any of the classic ways due to the way the

I am looking for a way to include a (matplotlib) legend that describe the size of points in a scatter plot, as this could be related to another variable, like in this basic example: import numpy as np import matplotlib.pyplot as plt N = 50 x = np.random.rand(N) y = np.random.rand(N) a2 = 400*np.random.rand(N) plt.scatter(x, y, s=a2, alpha=0.5) plt.show() (inspired from: http://matplotlib.org/examples/shapes_and_collections/scatter_demo.html ) so in the legend there would be ideally few spots corresponding to sizes 0-400 (the a2 variable), according to s descriptor in scatter . Ffisegydd The

Here's some code that does scatter plot of a number of different series using matplotlib and then adds the line y=x: import numpy as np, matplotlib.pyplot as plt, matplotlib.cm as cm, pylab nseries = 10 colors = cm.rainbow(np.linspace(0, 1, nseries)) all_x = [] all_y = [] for i in range(nseries): x = np.random.random(12)+i/10.0 y = np.random.random(12)+i/5.0 plt.scatter(x, y, color=colors[i]) all_x.extend(x) all_y.extend(y) # Could I somehow do the next part (add identity_line) if I haven't been keeping track of all the x and y values I've seen? identity_line = np.linspace(max(min(all_x), min

What is the best way to graph scatter plots in C++? Do you write data to a file and use another tool? Is there a library like matplotlib in Python? I always write out data and then using gnuplot to create my graphs. It is by far the best way I have found of producing graphs in a variety of formats: eps, png, jpeg, xpm, you name it. gnuplot will do scatter plot very easily. Provided the x and y values are in 2 space-separated columnss, then plot "data.txt" using 1:2 Will give you a quick scatter plot. Then you can adjust it and what not using other gnuplot commands. If you are involved in

I'm wondering if it is possible to have individual alpha values for each point to be plotted using the scatter function of Matplotlib. I need to plot a set of points, each one with its alpha value. For example, I have this code to plot some points def plot_singularities(points_x, p, alpha_point, file_path): plt.figure() plt.scatter(points_x, points_y, alpha=alpha_point) plt.savefig(file_path + '.png', dpi=100) plt.close() All my points_x , points_y and alpha_point have n values. However, I can't assign an array to the alpha parameter in scatter() . How can I have a different alpha value for