PlotSphereIntensity(azimuth, elevation)
PlotSphereIntensity(azimuth, elevation, intensity)
h = PlotSphereIntensity(...)
Plots the intensity (as color) of a number of points on a unit sphere.
Input:
azimuth (phi), in degrees
elevation (theta), in degrees
intensity (optional, if not provided, a green sphere is produced)
All inputs must be vectors or matrices of the same size. Data does not have to be evenly spaced. When there aren t enough points to draw a smooth sphere, additional points (with color) are interpolated.
Output:
h - a handle to the patch object
The axes are also plotted:
positive x axis is red
positive y axis is green
positive z axis is blue
實現最優二叉樹的構造;在此基礎上完成哈夫曼編碼器與譯碼器。 假設報文中只會出現如下表所示的字符:
字符 A B C D E F G H I J K L M N
頻度 186 64 13 22 32 103 21 15 47 57 1 5 32 20 57
字符 O P Q R S T U V W X Y Z , .
頻度 63 15 1 48 51 80 23 8 18 1 16 1 6 2
要求完成的系統應具備如下的功能:
1.初始化。從終端(文件)讀入字符集的數據信息,。建立哈夫曼樹。
2.編碼:利用已建好的哈夫曼樹對明文文件進行編碼,并存入目標文件(哈夫曼碼文件)。
3.譯碼:利用已建好的哈夫曼樹對目標文件(哈夫曼碼文件)進行編碼,并存入指定的明文文件。
4.輸出哈夫曼編碼文件:輸出每一個字符的哈夫曼編碼。