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Im getting a blank graph, and alot of errors.

4 次查看（过去 30 天）
John
John 2023-3-10
评论： Star Strider 2023-3-10
Ran in:
x = inline ('t>0', 't');
t1 = -2;
t2 = 6;
t = [t1, t2];
fplot (x, t)
Warning: Function behaves unexpectedly on array inputs. To improve performance, properly vectorize your function to return an output with the same size and shape as the input arguments.
Error using string
Conversion to string from inline is not possible.

Error in matlab.graphics.function.mixin.Legendable/displayNames (line 36)
s.none = replace(string(fn),[".*" ".^" "./"],["*" "^" "/"]);

Error in matlab.graphics.function.FunctionLine/updateFunction

Error in matlab.graphics.function.FunctionLine/set.Function_I

Error in matlab.graphics.function.FunctionLine/set.Function

Error in matlab.graphics.function.FunctionLine

Error in fplot>singleFplot (line 245)
hObj = matlab.graphics.function.FunctionLine(fn{1},extraOpts{:},args{:});

Error in fplot>@(f)singleFplot(cax,{f},limits,extraOpts,args) (line 200)
hObj = cellfun(@(f) singleFplot(cax,{f},limits,extraOpts,args),fn{1},'UniformOutput',false);

Error in fplot>vectorizeFplot (line 200)
hObj = cellfun(@(f) singleFplot(cax,{f},limits,extraOpts,args),fn{1},'UniformOutput',false);

Error in fplot (line 166)
hObj = vectorizeFplot(cax,fn,limits,extraOpts,args);

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采纳的回答

Star Strider
Star Strider 2023-3-10
Ran in:
Use an anonymous function instead of the deprecated inline function, and since the ‘x’ function actually returns a logical result, convert it to a numerical result by performing an arithmetic operation on it, here being a unary plus —
x = @(t) +t>0;
t1 = -2;
t2 = 6;
t = [t1, t2];
fplot (x, t)
xlabel('t')
ylabel('x')
... and the plot of the function magically appears!
.

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