Subscripted assignment between dissimilar structures.

I got this function that's been running well but now its now throwing this error: "Subscripted assignment between dissimilar structures".

wellSol is a: 1x2 struct fields array. ws fails to inherit this 1x2 struct, so at the end of function wellSol could not match equating it to ws, apparently causing this error.

I'd appreciate it if anyone could help me here.

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function wellSol = assignWellValuesFromControl(model, wellSol, W, wi)

for w = 1:numel(wellSol)

ws = wellSol(w);

if ~ws.status

continue

end

tp = ws.type;

v = ws.val;

switch tp

case 'bhp'

ws.bhp = v;

case 'rate'

if ws.sign < 1

continue;

end

if model.water

ws.qWs = v*W(w).compi(wi);

end

case 'wrat'

ws.qWs = v;

otherwise

error('Unknown well control mode %s', tp);

end

wellSol(w) = ws;

end

Answer 1

[Voss]

It seems likely that wellSol is missing some field that is assigned to ws in your code.

For instance, suppose that wellSol does not have a field 'bhp', but the code assigns a value to the 'bhp' field of the scalar struct ws and then tries to put ws back into wellSol, like this:

% 1-by-2 struct array that does not have a 'bhp' field:
wellSol = struct( ...
    'status',{true true}, ...
    'type',{'wrat' 'bhp'}, ...
    'val',{1 2}, ...
    'qWs',{0 0});

for w = 1:numel(wellSol)
    ws = wellSol(w);
    if ~ws.status
        continue
    end
    tp = ws.type;
    v  = ws.val;
    switch tp
        case 'bhp'
            % assign v to field 'bhp' in ws:
            ws.bhp = v;
            % now ws has a 'bhp' field but wellSol does not
        case 'wrat'
            ws.qWs = v;
    end
    % now the error happens here because ws and wellSol do not have the
    % same set of fields:
    try
        wellSol(w) = ws;
    catch ME
        fprintf('error on iteration %d (type %s):\n%s',w,tp,ME.message);
    end
end

error on iteration 2 (type bhp):
Subscripted assignment between dissimilar structures.