MATLAB常见错误之plot画图失败-Toy模板网

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错误使用 matlab.graphics.internal.newplotwrapper 尝试将 SCRIPT newplotwrapper 作为函数执行: C:\Program Files\Polyspace\R2020a\toolbox\matlab\graphics\+matlab\+graphics\+internal\newplotwrapper.m怎么解决

应该是动了newplotwrapper的内部代码

解决：

找到您的Matlab安装文件夹。在Windows上，默认情况下位于C:\Program Files\MATLAB\<MATLAB版本>。
打开toolbox\matlab\graphics\@matlab\graphics\internal文件夹。在该文件夹中，您可以找到名为newplotwrapper.m的文件，这是Matlab中的newplot函数的实际实现。
更改为：function axReturn = newplot(hsave)
%NEWPLOT Prepares figure, axes for graphics according to NextPlot.
% H = NEWPLOT returns the handle of the prepared axes.
% H = NEWPLOT(HSAVE) prepares and returns an axes, but does not
% delete any objects whose handles appear in HSAVE. If HSAVE is
% specified, the figure and axes containing HSAVE are prepared
% instead of the current axes of the current figure. If HSAVE is
% empty, NEWPLOT behaves as if it were called without any inputs.
%
% NEWPLOT is a standard preamble command that is put at
% the beginning of graphics functions that draw graphs
% using only low-level object creation commands. NEWPLOT
% "does the right thing" in terms of determining which axes and/or
% figure to draw the plot in, based upon the setting of the
% NextPlot property of axes and figure objects, and returns a
% handle to the appropriate axes.
%
% The "right thing" is:
%
% First, prepare a figure for graphics:
% Clear and reset the current figure using CLF RESET if its NextPlot
% is 'replace', or clear the current figure using CLF if its
% NextPlot is 'replacechildren', or reuse the current figure as-is
% if its NextPlot is 'add', or if no figures exist, create a figure.
% When the figure is prepared, set its NextPlot to 'add', and then
% prepare an axes in that figure:
% Clear and reset the current axes using CLA RESET if its NextPlot
% is 'replace', or clear the current axes using CLA if its NextPlot
% is 'replacechildren', or reuse the current axes as-is if its
% NextPlot is 'add', or if no axes exist, create an axes.
%
% See also HOLD, ISHOLD, FIGURE, AXES, CLA, CLF.

% Copyright 1984-2015 The MathWorks, Inc.
% Built-in function.

if nargin == 0 || isempty(hsave)
hsave = [];
elseif ~isscalar(hsave) || ~ishghandle(hsave)
error(message('MATLAB:newplot:InvalidHandle'))
else
% Make sure we have an object handle.
hsave = handle(hsave);
end

fig = gobjects(0);
ax = gobjects(0);

if ~isempty(hsave)
obj = hsave;
while ~isempty(obj)
if strcmp(obj.Type,'figure')
fig = obj;
elseif strcmp(obj.Type,'axes')
ax = obj;
end
obj = obj.Parent;
end
end

if isempty(fig)
fig = gcf;
end

fig = ObserveFigureNextPlot(fig, hsave);

% Set figure's NextPlot property to 'add' after obeying the previous setting.
fig.NextPlot = 'add';

checkNextPlot = true;
if isempty(ax)
ax = gca(fig);
if isa(ax,'matlab.graphics.axis.PolarAxes')
if ishold(ax)
error(message('MATLAB:newplot:HoldOnMixing'))
else
ax = matlab.graphics.internal.swapaxes(ax,@axes);

% We just creaetd a new axes, no need to check NextPlot
checkNextPlot = false;
end
end
elseif ~any(ishghandle(ax))
error(message('MATLAB:newplot:NoAxesParent'))
end

if checkNextPlot
ax = ObserveAxesNextPlot(ax, hsave);
end

if nargout
axReturn = ax;
end

function fig = ObserveFigureNextPlot(fig, hsave)
%
% Helper fcn for preparing figure for nextplot, optionally
% preserving specific existing descendants.
% GUARANTEED to return a figure, even if some crazy combination
% of create / delete fcns deletes it.

switch fig.NextPlot
case 'new'
% if someone calls plot(x,y,'parent',h) and h is an axes
% in a figure with NextPlot 'new', ignore the 'new' and
% treat it as 'add' - just add the axes to that figure.
if isempty(hsave)
fig = figure;
end
case 'replace'
clf(fig, 'reset', hsave);
case 'replacechildren'
clf(fig, hsave);
case 'add'
% nothing
end
if ~any(ishghandle(fig)) && isempty(hsave)
fig = figure;
end

function ax = ObserveAxesNextPlot(ax, hsave)
%
% Helper fcn for preparing axes for nextplot, optionally
% preserving specific existing descendants
% GUARANTEED to return an axes in the same figure as the passed-in
% axes, even if that axes gets deleted by an overzealous create or
% delete fcn anywhere in the figure.

% for performance only call ancestor when needed
fig = ax.Parent;
if ~strcmp(fig.Type,'figure')
fig = ancestor(fig,'figure');
end

switch ax.NextPlot
case 'replaceall';
cla(ax, 'reset', hsave);
case 'replace'
% If there are multiple data spaces, ax.prepareForPlot() will do a
% reset of the properties for the active data space (while
% preserving other data spaces) and return false to indicate that a
% full reset is not necessary. Otherwise, ax.prepareForPlot() will
% return true.
if (ax.prepareForPlot())
cla(ax, 'reset', hsave);
else
cla(ax, hsave);
end
case 'replacechildren'
cla(ax, hsave);
case 'add'
% nothing
end

if ~any(ishghandle(ax)) && isempty(hsave)
if ~any(ishghandle(fig))
ax = axes;
else
ax = axes('Parent',fig);
end
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