def rgb(minimum, maximum, value): minimum, maximum = float(minimum), float(maximum) ratio = 2 * (value-minimum) / (maximum – minimum) b = int(max(0, 255*(1 – ratio))) r = int(max(0, 255*(ratio – 1))) g = 255 – b – r return r, g, b
As a quick example (using a slightly cleaner method than the potentially duplicate question): import matplotlib.pyplot as plt fig = plt.figure() ax = fig.add_subplot(111) ax.plot(range(10)) ax.set_xlabel(‘X-axis’) ax.set_ylabel(‘Y-axis’) ax.spines[‘bottom’].set_color(‘red’) ax.spines[‘top’].set_color(‘red’) ax.xaxis.label.set_color(‘red’) ax.tick_params(axis=”x”, colors=”red”) plt.show() Alternatively [t.set_color(‘red’) for t in ax.xaxis.get_ticklines()] [t.set_color(‘red’) for t in ax.xaxis.get_ticklabels()]
Matplotlib has the imshow method for plotting arrays: import matplotlib as mpl from matplotlib import pyplot import numpy as np # make values from -5 to 5, for this example zvals = np.random.rand(100,100)*10-5 # make a color map of fixed colors cmap = mpl.colors.ListedColormap([‘blue’,’black’,’red’]) bounds=[-6,-2,2,6] norm = mpl.colors.BoundaryNorm(bounds, cmap.N) # tell imshow about color map … Read more
First, if an explanation of the broader differences between go and px is required, please take a look here and here. And if absolutely no explanations are needed, you’ll find a complete code snippet at the very end of the answer which will reveal many of the powers with colors in plotly.express Part 1: The … Read more
16711680 (decimal) is 0x00FF0000 (hexadecimal) 00 – Alpha value (0 dec) FF – Red (255 dec) 00 – Green (0 dec) 00 – Blue (0 dec) See http://www.php.net/manual/en/function.imagecolorallocatealpha.php to set the alpha byte Edit: Also, to answer your first question — yes, you can create a color without an image resource (and, consequently without a … Read more
According to MSDN, the Color.Equality Operator… …compares more than the ARGB values of the Color structures. It also does a comparison of some state flags. If you want to compare just the ARGB values of two Color structures, compare them using the ToArgb method So the method that you are using is correct for comparing … Read more
You’re using the wrong sign in the calcuations. Should be plus, not minus, to apply the ratio properly. int red = (int)Math.abs((ratio * FAR.getRed()) + ((1 – ratio) * CLOSE.getRed())); int green = (int)Math.abs((ratio * FAR.getGreen()) + ((1 – ratio) * CLOSE.getGreen())); int blue = (int)Math.abs((ratio * FAR.getBlue()) + ((1 – ratio) * CLOSE.getBlue())); The … Read more
UIManager.getLookAndFeelDefaults().put(“Panel.background”, Color.RED);
You’ll have to use an itemRenderer in order to accomplish this. See the following examples for more information: http://butterfliesandbugs.wordpress.com/2007/07/11/using-an-itemrenderer-to-change-the-background-of-a-datagrid-cell/ http://www.adobe.com/cfusion/communityengine/index.cfm?event=showdetails&postId=61&productId=2