在Matlab中可变宽度的线条

Question

如何绘制一条线条，其厚度在Matlab中的每个点处变化？我需要绘制一条平均线，然后将标准差绘制为它下方的阴影。有任何想法吗？

感谢，

Answer 1

这是我刚才写的东西 - 有点长，但你可以复制整个东西。它处理可变大小的输入并产生一个美妙的阴影 - 以std和min/max。信号应该是2D的。如果您需要绘制两个信号的一个版本 - 只问:)

function H = plotp(varargin) 

switch nargin 
    case{1} 
     signal = varargin{1}; 
     time = 1:size(signal,2); 
     prop = 'r-'; 
     new_figure = true; 
    case{2} 
     time = varargin{1}; 
     signal = varargin{2}; 
     prop = 'r-'; 
     new_figure = true; 
    case{3} 
     time = varargin{1}; 
     signal = varargin{2}; 
     prop = varargin{3}; 
     new_figure = true; 
    case{4} 
     time = varargin{1}; 
     signal = varargin{2}; 
     prop = varargin{3}; 
     new_figure = varargin{4}; 
end 

if ischar(new_figure) 
    temp7 = regexpi(new_figure,'true'); 
    if isempty(temp7) 
     new_figure = false; 
     H = get(0,'CurrentFigure'); 
    else 
     new_figure = true; 
    end 
elseif isnumeric(new_figure) 
    H = new_figure; 
    new_figure = false; 
end 

% prepare vectors for plotting 
time2 = [time fliplr(time)]; 

sigm = nanmean(signal); 
sigs = nanstd(signal); 
sigms = [sigm-sigs fliplr(sigm+sigs)]; 

sigmin = nanmin(signal); 
sigmax = nanmax(signal); 
sigmm = [sigmin fliplr(sigmax)]; 

% check color 
if strcmpi(prop(1),'r') 
    c1 = [1 0 0]; 
elseif strcmpi(prop(1),'g') 
    c1 = [0 1 0]; 
elseif strcmpi(prop(1),'b') 
    c1 = [0 0 1]; 
else 
    c1 = [1 1 1]; 
end 

color1 = c1 + .7*(1-c1); 
color2 = c1 + .8*(1-c1); 

% 
if length(prop) == 1 
    prop(2) = '-'; 
end 
if new_figure 
    H = figure; 
else 
    figure(H); 
end 

whole_screen = get(0,'ScreenSize'); 
% max figure size - add 
fig_size = whole_screen + [-4 -4+2*32 +4+4 4+4-2*32]; 
set(H,'OuterPosition',fig_size); 

plot(time,sigm,prop,'LineWidth',1.5) 
hold all 
fill(time2(~isnan(sigms)), sigms(~isnan(sigms)),color1,'EdgeColor',color1,'FaceAlpha', 0.4); 
fill(time2(~isnan(sigmm)), sigmm(~isnan(sigmm)),color2,'EdgeColor',color2,'FaceAlpha', 0.3); 
legend([{'Mean'} {'\pm Stddev'} {'Min/Max'} ],'Location','Best') 

Answer 2

，你可以画出三条线，一个作为平均值，另两个为+和 - 个标准差。

如果你感觉特别受虐狂，你可以计算你的线的置信区间并绘制它。