Removing a block and making connections

Question

Michael Joslin 2012-2-20

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https://ww2.mathworks.cn/matlabcentral/answers/29670-removing-a-block-and-making-connections

评论： Marco Baratelli 2016-1-22

Lets say I have a simple subsystem that is just an inport, an outport and a gain block. I want to get rid of the gain block and just have the inport connected to the outport. If i use replace_block I can only replace the gain with another block and if I use delete_block it will remove the gain but leave two disconnected lines. How can I remove this block and make the connection between the remaining two using code?

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Answer 1

Jarrod Rivituso 2012-2-20

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https://ww2.mathworks.cn/matlabcentral/answers/29670-removing-a-block-and-making-connections#answer_38033

在 MATLAB Online 中打开

I've run into this before. My solution was to find port handles and reconnect. I'm not sure if there is an easier way.

Here's a function that should do the trick:

function removeAndReconnectBlock(blockHandle)
%Get port handles and parent system
portHandles = get_param(blockHandle,'PortHandles');
sys = get_param(blockHandle,'Parent');
%Get source port
srcSignal = get_param(portHandles.Inport,'Line');
srcPort = get_param(srcSignal,'SrcPortHandle');
%Get destination port
destSignal = get_param(portHandles.Outport,'Line');
destPort = get_param(destSignal,'DstPortHandle');
%Remove
delete_line(destSignal);
delete_line(srcSignal);
delete_block(blockHandle);
%Reconnect
add_line(sys,srcPort,destPort)

Note that this only works for single input, single output blocks, but I'm sure you could see how you would extend it further.

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Michael Joslin 2012-2-20

This really help, thanks a lot!

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Answer 2

chandu 2014-12-8

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https://ww2.mathworks.cn/matlabcentral/answers/29670-removing-a-block-and-making-connections#answer_161672

May I know how to disconnect SimPowerSystems blocks using PortHandles? Please help me ASAP.....

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Marco Baratelli 2016-1-22

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The following works for me using SimScape! Hope it helps.

sbh = getSimulinkBlockHandle([sys '/NameOfYourSpecificBlock']);
ph  = get_param(sbh,'PortHandles');
srcSignal = get_param(ph.RConn,'Line'); % or LConn for left connection of the block
delete_line(srcSignal);