... | ... | @@ -107,14 +107,17 @@ This item is very similar to **NotEEG_chans** but the indices you are listing in |
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***
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**ref_loc_file**
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**ref_loc_file**
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The reference Location file is the montage that you want to warp your channel locations to. For this pipeline you will be warping to the MNI head. The config should point to the location file. The config should be```[ref_loc_file],analysis/support/misc/standard_1020.elc```. If the config is empty it will default back to this file as well. In the future this may want to be changed and thus was made a string_swap variable.
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***
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**tMatrix**
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**tMatrix**
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Warping or transforming, ensures that the location file that you loaded aligns with the standard MNI head model that is used later on in the pipeline for referencing. Both ESS capsules and Other sets need to provide this information through the config or through the interactive GUI. Essentially the pipeline needs a transformation matrix of 9 values to expand,translate and rotate in each dimension to get your locations to our positions. If you are using a standard transformation matrix for all of your subjects you can place the matrix in the config, for example ```[tMatrix],[ 0 , -23 , -50 , 0 , 0 , -240.3 , 1100 , 1100 , 1100 ] ```. If you you would like to do exact transformations for each file you will have to go through the GUIs. The first GUI allows you to input a file specific transformation matrix for that subject if you know it. If you do not know what it is yet, then click the manual checkbox to open the EEGLAB co-register GUI.
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![warp](/uploads/3ab26d4bbfe41c2f08b0f6100f2846f2/warp.png)
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Adjust the matrix that is displayed at the bottom until you find the right fit and press ```[ OK ]```.
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:so: After doing you first file by manually warping, you will be able to see the transformation matrix that will be used. You can use this matrix to help you get a *head start* ( :smile: ) on the next file, or use this in the config to morph all of the files the same way.
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![warp4](/uploads/0ffd5834f3356d22aae23e0861fe6ff0/warp4.png)
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