Replacing substring not working

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ludolfusexe
ludolfusexe 2024-5-27
评论： ludolfusexe 2024-5-27
Ran in:
Why isn't this working?
toBeChanged = "\dot{h}_j(\phi_j,x,y) = \delta _{u}-\delta _{l}\,{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}\,\phi_j";
toBeRemoved = "{\mathrm{e}}^{-\frac{{\left(p_{\mathrm{jx}}-x\right)}^2+{\left(p_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}";
isContained = contains(toBeChanged,toBeRemoved)
isContained = logical
0
newString = replace(toBeChanged, toBeRemoved,"{h(p,q_j)}");
Doing this with other smaller strings works just fine.
  2 个评论
Mathieu NOE
Mathieu NOE 2024-5-27
Ran in:
you made a slight error when doing the copy paste ...
toBeChanged contains left(q_
and
toBeRemoved contains left(p_
if you make the correction , it works
toBeChanged = "\dot{h}_j(\phi_j,x,y) = \delta _{u}-\delta _{l}\,{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}\,\phi_j";
toBeRemoved = "{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}";
isContained = contains(toBeChanged,toBeRemoved)
isContained = logical
1
newString = replace(toBeChanged, toBeRemoved,"{h(p,q_j)}")
newString = "\dot{h}_j(\phi_j,x,y) = \delta _{u}-\delta _{l}\,{h(p,q_j)}\,\phi_j"
ludolfusexe
ludolfusexe 2024-5-27
Wow, definitely needed a break, thank you!

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采纳的回答

Chunru
Chunru 2024-5-27
Ran in:
toBeChanged = "\dot{h}_j(\phi_j,x,y) = \delta _{u}-\delta _{l}\,{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}\,\phi_j";
% | |
toBeRemoved = "{\mathrm{e}}^{-\frac{{\left(p_{\mathrm{jx}}-x\right)}^2+{\left(p_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}";
s1 = extractAfter(toBeChanged, "\delta _{l}\,");
n = strlength(toBeRemoved);
s1 = char(s1); s2 = char(toBeRemoved);
i1 = int16(s1(1:n)); i2 = int16(s2)
i2 = 1x106
123 92 109 97 116 104 114 109 123 101 125 125 94 123 45 92 102 114 97 99 123 123 92 108 101 102 116 40 112 95
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
idx = find(i1 ~= i2)
idx = 1x2
29 64
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
s1(idx)
ans = 'qq'
s2(idx)
ans = 'pp'
isContained = contains(toBeChanged,toBeRemoved)
isContained = logical
0
toBeChanged = "\dot{h}_j(\phi_j,x,y) = \delta _{u}-\delta _{l}\,{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}\,\phi_j"
toBeChanged = "\dot{h}_j(\phi_j,x,y) = \delta _{u}-\delta _{l}\,{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}\,\phi_j"
toBeRemoved = "{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}"
toBeRemoved = "{\mathrm{e}}^{-\frac{{\left(q_{\mathrm{jx}}-x\right)}^2+{\left(q_{\mathrm{jy}}-y\right)}^2}{2\,\sigma ^2}}"
isContained = contains(toBeChanged,toBeRemoved)
isContained = logical
1
newString = replace(toBeChanged, toBeRemoved,"{h(p,q_j)}")
newString = "\dot{h}_j(\phi_j,x,y) = \delta _{u}-\delta _{l}\,{h(p,q_j)}\,\phi_j"

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