robot.plot3d命令运行时显示函数或变量 ‘v‘ 无法识别

想使用matlab机器人工具箱的命令robot.plot3d命令，然后跟着网上教程做完之后显示：

函数或变量 'v' 无法识别。

出错 SerialLink/plot3d>rndread (第 469 行)
    vout = v';  % "

出错 SerialLink/plot3d (第 124 行)
            [F,P] = rndread( fullfile(pth, sprintf('link%d.stl', i-1)) );

请问大佬们怎么解决

↓我的代码

clear;
clc;
%       theta    d        a        alpha      offset
L(1)=Link([0     0.215      0        pi/2],'standard'); %定义连杆的D-H参数
L(2)=Link([0       0        1         0],'standard');
L(3)=Link([0       0        0.8       0],'standard');
L(4)=Link([0       0        0.7     -pi/2],'standard');
L(5)=Link([0       0       0.23       0],'standard');
Robot=SerialLink(L,'name','Robot');
Robot.base=transl(0,0,0);
L(2).qlim=[0,120/180*pi];
L(3).qlim=[-170/180*pi,-20/180*pi];
L(4).qlim=[10/180*pi,160/180*pi];
L(5).qlim=[-120/180*pi,120/180*pi];

v=[130 20];%观看视角【方位角，仰角】
w=[-2 2 -2 2 0 2.5];%工作空间大小
q0=[0,92*pi/180,210*pi/180,137*pi/180,-80*pi/180];%工作角度
Robot.plot3d(q0,'tilesize',0.1,'workspace',w,'path','C:\Users\administor\Desktop\robot','nowrist','view',v);
light('posotion',[1 1 1],'color','w');

报错后查看错误代码内容

function [fout, vout, cout] = rndread(filename)
    
    % Reads CAD STL ASCII files, which most CAD programs can export.
    % Used to create Matlab patches of CAD 3D data.
    % Returns a vertex list and face list, for Matlab patch command.
    %
    % filename = 'hook.stl';  % Example file.
    %
    fid=fopen(filename, 'r'); %Open the file, assumes STL ASCII format.
    if fid == -1
        error('File could not be opened, check name or path.')
    end
    %
    % Render files take the form:
    %
    %solid BLOCK
    %  color 1.000 1.000 1.000
    %  facet
    %      normal 0.000000e+00 0.000000e+00 -1.000000e+00
    %      normal 0.000000e+00 0.000000e+00 -1.000000e+00
    %      normal 0.000000e+00 0.000000e+00 -1.000000e+00
    %    outer loop
    %      vertex 5.000000e-01 -5.000000e-01 -5.000000e-01
    %      vertex -5.000000e-01 -5.000000e-01 -5.000000e-01
    %      vertex -5.000000e-01 5.000000e-01 -5.000000e-01
    %    endloop
    % endfacet
    %
    % The first line is object name, then comes multiple facet and vertex lines.
    % A color specifier is next, followed by those faces of that color, until
    % next color line.
    %
    CAD_object_name = sscanf(fgetl(fid), '%*s %s');  %CAD object name, if needed.
    %                                                %Some STLs have it, some don't.
    vnum=0;       %Vertex number counter.
    report_num=0; %Report the status as we go.
    VColor = 0;
    %
    while feof(fid) == 0                    % test for end of file, if not then do stuff
        tline = fgetl(fid);                 % reads a line of data from file.
        fword = sscanf(tline, '%s ');       % make the line a character string
        % Check for color
        if strncmpi(fword, 'c',1) == 1;    % Checking if a "C"olor line, as "C" is 1st char.
            VColor = sscanf(tline, '%*s %f %f %f'); % & if a C, get the RGB color data of the face.
        end                                % Keep this color, until the next color is used.
        if strncmpi(fword, 'v',1) == 1;    % Checking if a "V"ertex line, as "V" is 1st char.
            vnum = vnum + 1;                % If a V we count the # of V's
            report_num = report_num + 1;    % Report a counter, so long files show status
            if report_num > 249;
                %disp(sprintf('Reading vertix num: %d.',vnum));
                report_num = 0;
            end
            v(:,vnum) = sscanf(tline, '%*s %f %f %f'); % & if a V, get the XYZ data of it.
            c(:,vnum) = VColor;              % A color for each vertex, which will color the faces.
        end                                 % we "*s" skip the name "color" and get the data.
    end
    %   Build face list; The vertices are in order, so just number them.
    %
    fnum = vnum/3;      %Number of faces, vnum is number of vertices.  STL is triangles.
    flist = 1:vnum;     %Face list of vertices, all in order.
    F = reshape(flist, 3,fnum); %Make a "3 by fnum" matrix of face list data.
    %
    %   Return the faces and vertexs.
    %
    fout = F';  %Orients the array for direct use in patch.
    vout = v';  % "
    cout = c';
    %
    fclose(fid);
end

就是其中那个vout=v';%''出了问题，显示函数或变量 'v' 无法识别。

请问大佬们怎么解决呀