我的结构有三个字段：
>> design
design =
E: [1x101 double]
F: [1x21 double]
bandsImg: []
现在，我通过添加一个新字段来修改函数中的结构：
function design = loadSelfSimp(design,values)
design.newField = values(1);
最后在我的主要代码中：
design = loadSelfSimp(design, somevalues)
MATLAB抱怨：
Subscripted assignment between dissimilar structures.
Error in selfSimpPoor (line 101)
design(i) = loadSelfSimp(design(i),selfSimp_out);
这是什么问题？如何轻松解决？
代码：
function [design,conv] = selfSimp(design,question)
if nargin == 1
question = 1;
end
numDes = length(design);
for i = 1:numDes
well = design(i).well;
barr = design(i).barr;
dopeWell = design(i).dopeWell;
dopeBarr = design(i).dopeBarr;
barrX = design(i).barrX;
elemDens = design(i).elemDens;
numPer = design(i).numPer;
iterFac = design(i).iterFac;
posMeth = design(i).posMeth;
if isfield(design(i),'bandSwitch')
bandSwitch = design(i).bandSwitch;
design(i).wvFunslh = [];
design(i).Elh = [];
design(i).wvFunshh = [];
design(i).Ehh = [];
else
bandSwitch = 1;
end
elecTemp = design(i).elecTemp;
numWell = length(well);
%check if there is any value in minSplitField
if isfield(design(i),'minSplitField') && (isempty(design(i).minSplitField) == 0)
minSplitField = design(i).minSplitField;
else
F = design(i).F;
minSplitField = F(ceil(numF/2));
end
%%%%% do some tests before starting
%%% Test to see if F, well and barr are row vectors
sze = size(well);
if sze(1)~=1
disp(' WARNING: well is either not one dimentional or is a column vector')
end
sze = size(barr);
if sze(1)~=1
disp(' WARNING: barr is either not one dimentional or is a column vector')
end
clear sze
disp(minSplitField);
%save the values found for read in by 'qclsolve'
fid = fopen('../../bin/qclsolve_in.dat','w');
fprintf(fid,'#\n#\n# Number of wells:\n');
fprintf(fid,'%-2.0f',numWell);
fprintf(fid,'\n#\n#\n#\n# Widths of wells:\n');
fprintf(fid,'%-9.4f',well);
fprintf(fid,'\n#\n#\n#\n# Widths of barriers\n');
fprintf(fid,'%-9.4f',barr);
fprintf(fid,'\n#\n#\n#\n# Doping in wells\n');
fprintf(fid,'%-10.2e',dopeWell);
fprintf(fid,'\n#\n#\n#\n# Doping barriers\n');
fprintf(fid,'%-10.2e',dopeBarr);
fprintf(fid,'\n#\n# Aluminum barrier fraction\n');
fprintf(fid,'%-6.4f',barrX);
fprintf(fid,'\n#\n# Element density (for grid/mesh)\n');
fprintf(fid,'%-4.2f',elemDens);
fprintf(fid,'\n#\n# minSplitField - field at which minimum injector-upper occours\n');
fprintf(fid,'%-4.2f',minSplitField);
fprintf(fid,'\n#\n# number of period repeats\n');
fprintf(fid,'%-2.0f',numPer);
fprintf(fid,'\n#\n# starting fraction of electrons to use in self-consistant\n');
fprintf(fid,'%-4.2f',iterFac);
fprintf(fid,'\n#\n# method of finding electron positions (1 or 2, 1 is best)\n');
fprintf(fid,'%-2.0f',posMeth);
fprintf(fid,'\n#\n# Which band we are soling in (1=Conduction, 2=Valence)\n');
fprintf(fid,'%-2.0f',bandSwitch);
fprintf(fid,'\n#\n# If the solution is to self-consistant then =1, else 0 \n');
fprintf(fid,'%-2.0f',1);
fprintf(fid,'\n#\n# Electron temperature in Kelvin\n');
fprintf(fid,'%-6.2f',elecTemp);
fclose(fid);
%call the solver to print the band structure at the minimum splitting field
if isunix
unix('././bin/qclsolve');
else
dos('..\..\bin\qclsolve.exe');
end
selfSimp_out = load('../../bin/states_out.dat');
conv(i) = selfSimp_out(1,end);
%what to do depends on if it converged
if conv(i) || (question==2)
design(i) = loadSelfSimp(design(i),selfSimp_out);
% design_a = loadSelfSimp(design(i),selfSimp_out);
elseif question == 1
cont = input('Did not converge, load anyway? (y/n)','s');
if cont == 'y'
design(i) = loadSelfSimp(design(i),selfSimp_out);
end
end
end
function design = loadSelfSimp(design,selfSimp_out)
lower = design.lowInjUp(1);
injector = design.lowInjUp(2);
upper = design.lowInjUp(3);
upper2 = design.lowInjUp(4);
extractor = design.lowInjUp(5);
LO = design.lowInjUp(6); % extractor1
LO1 = design.lowInjUp(7);%LO
try
bandSwitch = design.bandSwitch;
catch
bandSwitch = 0;
end
E = selfSimp_out(end,3:end);
%E = selfSimp_out(45,3:45);
wvFuns = selfSimp_out(1:(end-1),:);
%find the frequency and dipoles
frequency = (1.60219e-19/6.6262e-34)*(E(upper) - E(lower));
% find voltage/period
Vpp = design.minSplitField*(design.well(1)+design.well(2)+design.well(3)+design.well(4)+ design.barr(1)+design.barr(2)+design.barr(3)+design.barr(4));
%Find rabi frequency
hbar = 6.58211928e-16; % in terms of eV
q = 1.6022e-19;
minSplitting = E(upper) - E(injector);% resonance of energy levels in both the wells
minSplitting2 = E(extractor) - E(lower);
design.E = E;
z1_simp_iu = dipole(design,upper,injector)
rabi_freq_iu = abs(design.minSplitField*z1_simp_iu*(1e-5)/(hbar));
coupling_energy_iu = hbar*rabi_freq_iu*10^3;
design.coupling_energy_iu = coupling_energy_iu;
我的结构：
c1 =
E: [1x101 double]
F: [1x21 double]
bandsImg: []
barr: [6 3.8000 1.8000 3.3000 5.2000]
barrX: 0.1500
dipole1: 3.5718
dipole1V: [71x1 double]
dipole2: 0.2655
dipole2V: [71x1 double]
dopeBarr: [0 0 0 0 0]
dopeWell: [0 0 0 0 1.9600e+16]
elemDens: 2
frequency: 3.7630e+12
iterFac: 1
lowInjUp: [11 16 14 13 10 9 7]
minSplitField: -7.3500
minSplitting: -0.0019
name: ' Modified Amanti deisgn ETH'
numPer: 3
posMeth: 2
splittingV: [1x20 double]
well: [12 9.5000 9.5000 9 19.5000]
wvFuns: [542x103 double]
alpha: [4x1001 double]
dipoles: []
elecTemp: 100
minSplitting2: []
splittingV2: []
dipole3: []
design.E = E;不会导致问题（design.E已存在），但design.coupling_energy_iu = coupling_energy_iu;会出现问题。
答案 0 :(得分：2)
当您尝试为结构数组分配新元素时，会导致该问题。如果此元素具有不同的字段集，则会给出指定的错误，例如：
for k = 1:4;
s(k).a = k;
s(k).b = k;
end
t.a = 5;
try
s(5) = t;
catch
fprintf('This is error1\n');
end
t.b = 5;
t.c = 5;
try
s(5) = t;
catch
fprintf('This is error2\n');
end
% Possible cure
s(1).c = [];
s(5) = t;
% t.b=[]; s(5) = t;
fprintf('This works!\n');
但是，在您的代码中，您可能会进行某种检查以确保所有字段都在那里。另一种解决方案是使用单元阵列。