在MATLAB中,empty是一个函数,用于检查数组是否为空。如果数组是空的,则empty函数返回逻辑值true,否则返回false。 基本用法 假设你有一个变量A,你可以使用empty(A)来检查A是否为空。 matlab A = []; if empty(A) disp('A is empty.') else disp('A is not empty.') end 在这个例子中,因为A是一个空...
方法/步骤 1 if ~isempty(get(groot,'CurrentFigure')) %如果现有的窗口没有图disp('There are existing figures.') %显示There are existing figureselse disp('There are no existing figures.') %显示There are no ...
if((isempty(begin_value)||isempty(step_length)||isempty(end_value))==1)||((~get(handles.radiobutton1,'value'))&&(~get(handles.radiobutton2,'value'))) set(handles.Show,'string',"Error"); [y1,Fs1]=audioread('sound3.mp3'); player1=audioplayer(y1,Fs1); playblocking(player1); e...
ColorInRGBColor= [1,0,0];methodsfunctionobj = ColorInRGB(c)ifnargin > 0 obj.Color = c;endendendend Call theemptymethod. A = ColorInRGB.empty; You can expand this empty array into a nonempty array by assigning a value to it. For more information on how MATLAB fills arrays with obj...
Modal figures do not display menu children, built-in menus, or toolbars. But, it is not an error to create menus in a modal figure or to change theWindowStyleproperty setting to'modal'on a figure with menu children. TheMenuobjects exist and the figure retains them. If you reset the ...
file to set the path disp(' '); disp('Creating the initialization file "startup.m".'); p = which('startup.m'); if isempty(p) p = [d,filesep,'startup.m']; end fid = fopen(p,'a'); if isequal(fid,-1) error(['Could not modify the initialization file "startup.m".',....
由于gui_Create为真,这里if语句的判断结果肯定为假。然后程序首先判断了窗口的Singleton性质和可见性。由于这里程序太长,下面再分块分析。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 %Do feval on layout codeinm-fileifit exists gui_Exported=~isempty(gui_State.gui_LayoutFcn);%thisapplication data ...
没个if 都要有一个end对应，组成完整的判断分支程序结构 可以是 if ...end if ...else...end if ...elseif ...else ...end 也就是出现一个if 至少要有一个end与其对应 而你的程序里面居然有这样的结构 if nargin<6,if isempty(lb),lb=zeros(size(f));end 这里就少了一个与if对应...
S = ['If three or more periods occur before the '... 'end of a line, then the rest of that line is ' ... 'ignored and MATLAB continues to the next line'] 要将多行命令中的一行注释掉,请在该行的开头使用...以确保命令保持完整。如果您使用%将某一行注释掉,则会产生错误: ...
The filename parameter is optional; if not present, output is to the screen rather than to the filename. The format string formats the output. The basic elements that may be used in the format string are %P.Qe for exponential notation %P.Qf fixed point %P.Qg becomes %P.Qe or %P.Qf ...