Matlab直方图创建

Question

我正在尝试使用正态分布拟合创建直方图。我写了代码，但它一直说：索引超过矩阵维度。代码如下：

sigma=handles.Ht(end);
        figure(1)
        x_min = min(handles.array);
        x_max = max(handles.array);
        x_full = linspace(x_min,x_max,100);
        x_partial = x_full(x_full < L);
        y_full = normpdf(x_full,mean(handles.array),sigma);
        y_partial = normpdf(x_partial,mean(handles.array),sigma);
        area(x_full,y_full,'FaceColor','b');
        hold on;
        area(x_partial,y_partial,'FaceColor','r');
        grid on;
        % Histogram data
        [count,bins] = hist(handles.array,30);
        % Scale bins
        num_returns = numel(handles.array);
        scale = (bins(2)-bins(1))*num_returns;
        % Plot full data set
        a = bar(bins,count/scale,'w');
        set(get(a,'Children'),'FaceAlpha',0.8)
        hold off;
        title(['Best Normal Fit of Returns. Red Indicates Returns Below VaR: ',num2str(L)],'FontWeight','bold');
        handles.matrici.Mdati=[handles.array, handles.Ht, handles.VaR_p];
        guidata(handles.figure1, handles);

Matlab 说错误是“面积”函数，但我不明白为什么。 有什么想法吗？

Index exceeds matrix dimensions.

Error in area (line 98)
            set(h(1),'RefreshMode','auto');

Error in Var_final>inv_quantile (line 643)
        area(x_partial,y_partial,'FaceColor','r');

Error in Var_final>pushbutton_calcola_Callback (line 309)
inv_quantile(handles)

Error in gui_mainfcn (line 96)
        feval(varargin{:});

Error in Var_final (line 42)
    gui_mainfcn(gui_State, varargin{:});

Error in
@(hObject,eventdata)Var_final('pushbutton_calcola_Callback',hObject,eventdata,guidata(hObject))


Error while evaluating uicontrol Callback

Answer 1

通过向area 提供空向量作为输入，我得到了同样的错误，我觉得这就是你正在做的事情：

area([], [])

我建议你在屏幕上打印size(x_partial) 和size(y_partial) 来调试它。