matlab的colorbar函数

cbar = colorbar('peer',cax);

``````I=imread('F:\1.tif');
imshow(I);
colorbar;
``````

PCL可视化点云中怎样添加一个colorbar

Matlab 画图，根据shp地图文件白化

data=load('data.txt'); lat=data(:,1); lon=data(:,2); rain=data(:,3); clear data level0=find(rain==0); level1=find(rain>0&rain<=0.1); level2=find(rain>0.1&rain<=0.5); level3=find(rain>0.5&rain<=1); level4=find(rain>1&rain<=5); level5=find(rain>5&rain<=10); level6=find(rain>10); rain(level0)=nan; rain(level1)=1; rain(level2)=2; rain(level3)=3; rain(level4)=4; rain(level5)=5; rain(level6)=6; cmap=[255,255,255;0,255,3;0,255,253;0,0,254;255,253,6;249,2,255;254,0,2]/255; figure set(gcf,'position',[100 100 800 650]) scatter(lon,lat,10,rain,'fill') set(gca,'fontsize',18,'linewidth',1.5,'box','on') xlim([floor(min(lon))-1 floor(max(lon))+1]) ylim([floor(min(lat))-1 floor(max(lat))+1]) ylabel('Latitude') xlabel('Longitude') colormap(cmap) cb=colorbar; caxis([-0.5 6.5]) set(cb,'ytick',-0.5:1:6.5,'yticklabel',{'','0','0.1','0.5','1','5','10','15'}) 用matlanb画了一张散点图，现在要根据.shp文件，加上地图，并且白化地图区域外，求大神帮帮忙 ![图片说明](https://img-ask.csdn.net/upload/201711/21/1511253999_764256.jpg)

R语言 levelplot函数在绘图时，如何在多张图之间统一颜色的绘图方式

1 报错 extract_brodatz 错误使用 fopen 文件标识符必须为双精度类型的整数值标量。 出错 loadimg (line 9) fid = fopen(fn,'r'); 出错 extract_brodatz (line 37) texture = loadimg(filename,sz); 2代码 ``` function data = loadimg(fn,sz) if nargin == 1 sz = [128 128]; end; SZ = [sz sz]; fid = fopen(fn,'r'); data = fread(fid,SZ,'uchar')'; fclose(fid); ``` ``` filename = extractName(fn(i,:)); texture = loadimg(filename,sz); ```

PCL1.5 可视化点云中怎样添加一个colorbar

python 关于调整子图间距

![图片说明](https://img-ask.csdn.net/upload/201807/27/1532664368_347563.png) 我用python中的matplotlib作图，但子图上下间距太近，遮挡了横坐标，请问一下要怎么处理才能将上下间距调大，能显示出所有子图的横坐标。 下面是我作图的代码： def density_plot(data): #自定义作图函数 plt.rcParams['font.sans-serif']=['SimHei'] plt.rcParams['axes.unicode_minus']=False p = data.plot(kind='kde', linewidth = 2, subplots = True, sharex = False) [p[i].set_ylabel('density') for i in range(k)] plt.legend() return plt density_plot(df_x[r0[u'聚类类别']==0])

fig = plt.figure(figsize=(2.5, 3.53557), dpi=180) ax1 = fig.add_subplot(711) norma = mpl.colors.Normalize(vmin=0, vmax=40) map = ax1.imshow(data112, interpolation='nearest', cmap=cmap, as pect='auto', norm=norma, origin='lower') font2 = {'family': 'Times New Roman', 'weight': 'normal', 'size': 30} plt.xlabel('Electron low energy range(1～22MeV)', font2, fontsize=4, labelpad=0.5) plt.ylabel('Pitch Angle(deg.)', font2, fontsize=3, labelpad=0.1) plt.xlim(0, 262) plt.ylim(0, 9) cb = fig.colorbar(mappable=map, cax=None, ax=ax1, pad=0.01, aspect=2, shrink=1.0, norm=norm, ticks=[0, 10, 20, 30]) cb.set_label('\$Counts(cm^-2s^-1Str^-1)\$', size=2) cb.ax.tick_params(labelsize=4, direction='in', right='True') ax7 = fig.add_subplot(717) ax7.plot(np.arange(0, len(Electron_counts)), Electron_counts, color='b', label='e', linewidth=0.4) ax7.plot(np.arange(0, len(Proton_counts)), Proton_counts, color='r', label='p', linewidth=0.4) plt.legend(bbox_to_anchor=(1.01, 0.5), loc=6, borderaxespad=0, fontsize=4) font2 = {'family': 'Times New Roman', 'weight': 'normal', 'size': 30} plt.xlabel('Electron low energy range(1～22MeV)', font2, fontsize=2, labelpad=0.5) plt.xlim(0, 262) plt.ylim(0, 340) plt.ylabel('\$Counts(cm^-2s^-1Str^-1)\$', font2, fontsize=2, labelpad=0.5) plt.yticks([0, 100, 200, 300], ['0', '100', '200', '300']) plt.show() ![图片说明](https://img-ask.csdn.net/upload/201908/17/1566030580_217227.png) ``` ```

【matlab帮忙改程序】这一份matlab代码，如何去掉一个支链，从3-RRR机构变成2-RRR机构的求解？程序是怎么样的？

%% This Matlab code for drawing the dexterity index for 3-RRR Planar Parallel Manipulator (PPM) clear clc global a1x a1y a2x a2y a3x a3y r1 r2 r3 l1 l2 l3 r1=0.40; r2=0.40; r3=0.40; l1=0.40; l2=0.40; l3=0.40; %% Plot the workspace area which is the intersected area of the 3 circle % Position of the 1st active joint a_1 a1x=-0.349; a1y=-0.202; plot(a1x,a1y,'bo') hold on % Position of the 2nd active joint a_2 a2x=0.349; a2y=-0.202; plot(a2x,a2y,'bo') hold on % Position of the 3rd active joint a_3 a3x=0; a3y=0.404; plot(a3x,a3y,'bo') hold on % The length of the links of the active link ri and the passive one li [ where i =1,2,3 ] ] ri=0.40; li=0.40; %% Plot circles (if you want to observe the intersected area came from) % for circle 1 %C1=circleplot(a1x,a1y,(ri+li)) % for circle 2 %C2=circleplot(a2x,a2y,(ri+li)) % for circle 3 %C3=circleplot(a3x,a3y,(ri+li)) %hold on %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% The intersection points of the 3 circle [x1out,y1out] = circcirc(a1x,a1y,(ri+li),a2x,a2y,(ri+li)); [x2out,y2out] = circcirc(a3x,a3y,(ri+li),a2x,a2y,(ri+li)); [x3out,y3out] = circcirc(a1x,a1y,(ri+li),a3x,a3y,(ri+li)); %%%%%%%%%%%%%%%%%%% %% Plot the curve of the intersection area between a1 , a2 and a3 which give us the workspace area. d = sqrt((x3out(2)-x1out(1))^2+(y3out(2)-y1out(1))^2); % Distance between points a = atan2(x3out(2)-x1out(1),-(y3out(2)-y1out(1))); % Perpendicular bisector angle b = asin(d/2/(ri+li)); % Half arc angle c = linspace(a-b,a+b); % Arc angle range e = sqrt((ri+li)^2-d^2/4); % Distance, center to midpoint xcurve = (x1out(1)+x3out(2))/2-e*cos(a)+(ri+li)*cos(c); % Cartesian coords. of arc ycurve = (y1out(1)+y3out(2))/2-e*sin(a)+(ri+li)*sin(c); plot(xcurve,ycurve,'k.') hold on d = sqrt((x2out(2)-x1out(1))^2+(y2out(2)-y1out(1))^2); % Distance between points a = atan2(-(x2out(2)-x1out(1)),y2out(2)-y1out(1)); % Perpendicular bisector angle b = asin(d/2/(ri+li)); % Half arc angle c = linspace(a-b,a+b); % Arc angle range e = sqrt((ri+li)^2-d^2/4); % Distance, center to midpoint xcurve = (x1out(1)+x2out(2))/2-e*cos(a)+(ri+li)*cos(c); % Cartesian coords. of arc ycurve = (y1out(1)+y2out(2))/2-e*sin(a)+(ri+li)*sin(c); plot(xcurve,ycurve,'k.') hold on d = sqrt((x3out(2)-x2out(2))^2+(y3out(2)-y2out(2))^2); % Distance between points a = atan2(-(x3out(2)-x2out(2)),y3out(2)-y2out(2)); % Perpendicular bisector angle b = asin(d/2/(ri+li)); % Half arc angle c = linspace(a-b,a+b); % Arc angle range e = sqrt((ri+li)^2-d^2/4); % Distance, center to midpoint xcurve = (x2out(2)+x3out(2))/2-e*cos(a)+(ri+li)*cos(c); % Cartesian coords. of arc ycurve = (y2out(2)+y3out(2))/2-e*sin(a)+(ri+li)*sin(c); plot(xcurve,ycurve,'k.') hold on xlabel('X [m]') % x-axis label ylabel('Y [m]') % y-axis label xlim([-0.5 0.55]) % xlim([-0.3 0.9]) set(gca,'xtick',-0.55:0.1:0.55) ylim([-0.5 0.55]) % ylim([-0.3 0.9]) set(gca,'ytick',-0.55:0.1:0.55) set(gca,'FontSize',15) %% Test for area from 0 to 0.5 meter in x and y if the (x,y) locted at the workspace of the robot or not i=0; j=0; k=0; cx=-1.2:0.005:1.2; cy=-1.2:0.005:1.2; [CX,CY] = meshgrid(cx,cy); for i = 1:length(cx) for j = 1:length(cy) %% Test condition if the postion of end effector in the workspace or not. if( ((cx(i)-a1x)^2+(cy(j)-a1y)^2<=(r1+l1)^2) && ((cx(i)-a2x)^2+(cy(j)-a2y)^2<=(r2+l2)^2) && ((cx(i)-a3x)^2+(cy(j)-a3y)^2<=(r3+l3)^2)) disp('Value within specified range.') % Passive joints Beta beta=passivejoint(cx(i),cy(j)); alpha=ikm(cx(i),cy(j)); Jx=[cos(beta(1)) sin(beta(1)); cos(beta(2)) sin(beta(2)); cos(beta(3)) sin(beta(3))]; Jq=[r1*sin(beta(1)-alpha(1)) 0 0; 0 r2*sin(beta(2)-alpha(2)) 0; 0 0 r3*sin(beta(3)-alpha(3))]; % Jacobian matrix and dexterity index derivation J=Jq\Jx; s=svd(J); sigmamin=min(s); sigmamax=max(s); eta=sigmamin/sigmamax; Eta(j,i)=eta; plot(j,i) else disp('Value out of specified range.') Eta(j,i)=0; end end end %% Plotting axis square grid hold on [z,h]= contour(CX,CY,Eta,'ShowText', 'on'); colormap(jet) % Change the width of the lines in the contour map h.LineWidth = 1.5; colorbar

matplotlib模块有问题，重装了也没用？

Mac下的Anaconda 无法使用matplotlib.pyplot

File "/anaconda3/lib/python3.6/site-packages/matplotlib/__init__.py", line 891, in __getitem__ from matplotlib import pyplot as plt File "/anaconda3/lib/python3.6/site-packages/matplotlib/pyplot.py", line 32, in <module> import matplotlib.colorbar File "/anaconda3/lib/python3.6/site-packages/matplotlib/colorbar.py", line 28, in <module> import matplotlib.artist as martist AttributeError: module 'matplotlib' has no attribute 'artist'

![图片说明](https://img-ask.csdn.net/upload/201805/02/1525267299_368018.jpg) 如上图，要求有标题，横纵坐标都为字母，右边有热力图图例，总之越像越好。最好标题和横纵坐标都和上图一致，中间的数据以列表形式给出，代码中多加点注释，我好理解一点。本人新手，以前没接触过绘图，知道很麻烦各位大神，请大神见谅。谢谢！ 其实关于matplotlib生成热力图的问题我也看过不少，但好像没有完全能用的。我看到有个相似的代码如下，但缺少右边的colorbar，请问大神如何修改代码添加colorbar？： import matplotlib.pyplot as plt import numpy as np column_labels = list('ABCD') row_labels = list('WXYZ') data = np.random.rand(4,4) fig, ax = plt.subplots() heatmap = ax.pcolor(data, cmap=plt.cm.Blues) ax.set_xticks(np.arange(data.shape[0])+0.5, minor=False) ax.set_yticks(np.arange(data.shape[1])+0.5, minor=False) ax.invert_yaxis() ax.xaxis.tick_top() ax.set_xticklabels(row_labels, minor=False) ax.set_yticklabels(column_labels, minor=False) plt.show()

wpf如何实现做二维坐标系上的点坐标对应不同的颜色

wpf建立一个二维坐标系，上面绘制不同的点，不同的点对应的强度值大小不同，不同的强度值如何对应不同的颜色，也就是如何跟colorbar对应？求高手指点，谢谢

python matplotlib报错 mac系统，急！！！

python用matplotlib画图时如何使坐标轴的数字显示为千分位的形式如100,000,000

python用matplotlib画图时如何使坐标轴的数字显示为千分位的形式如100,000,000

matplotlib 条形图bar 缺少x

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