Removing a TEX arrow symbol from String

9 次查看（过去 30 天）
Jason
Jason 2020-2-13
评论： Jason 2020-2-13
hello.
I have several text objects on a plot that I want to alter. Its actually created using the TEX interpreter in the text function:
txt='E4E'
txt=horzcat('\leftarrow',txt);
text(app.UIAxes,x,y,txt,'Color',cl,'FontSize',12,'Interpreter', 'tex','HorizontalAlignment','left','VerticalAlignment','middle');
Sometimes the rightarrow is used.
Text (532 E4E\rightarrow) with properties:
String: '532 E4\rightarrow'
FontSize: 20
FontWeight: 'normal'
FontName: 'Helvetica'
Color: [0 1 0]
HorizontalAlignment: 'left'
Position: [320 5100 0]
Units: 'data'
I want to remove the arrows, and have tried this.
htext=findobj(app.UIAxes,'Type','text');
n=numel(htext);
for i=1:n
h=htext(i)
s1='\rightarrow'
s2='\leftarrow'
newStr=erase(h.String,s1); %Delete S1 if present
newStr=erase(h.String,s1); %Delete S2 if present
h.String=newStr; %reassign
end
But it only does one arrow orientation?

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采纳的回答

Subhadeep Koley
Subhadeep Koley 2020-2-13
Your code is almost correct but, before erasing you need to check whether the h.String contains \leftarrow or \rightarrow. Use the code below.
htext=findobj(app.UIAxes, 'Type', 'text');
n = numel(htext);
for i = 1:n
h = htext(i);
s1 = '\rightarrow';
s2 = '\leftarrow';
if contains(h.String, s1,'IgnoreCase',true)
newStr = erase(h.String,s1);
h.String = newStr;
else
newStr = erase(h.String,s2);
h.String = newStr;
end
end
  1 个评论
Jason
Jason 2020-2-13
Thanks. I had assumed erase would not do anything if the S1 or S2 weren't present.
Jason

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