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# Epoching Data
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Epoching data is useful as it allows you to explore the data in more ways. It is important to use the following procedure to epoch the data rather then the native EEGLAB method. This method does the exact same thing as the EEGLAB epoching except it recognises the marks structure and will keep it intact.
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Epoching data is useful as it allows you to explore the data in more ways. It is important to use the following procedure to epoch the data rather then the native EEGLAB method. This method does the exact same thing as the native EEGLAB epoching except it recognises the new marks structure inside of EEG and will not accidentally remove it.
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To get started go to:
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* *Tools-> Marks -> epoching/concatenate data -> Epoch Data into Regular Intervals*
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![marksepochcat](/uploads/62091d9dc2bb47f25531db967a3c4ecd/marksepochcat.png)
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The pop up will ask you for:
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* Epoch reoccurance interval: how seperated the epoces will be.
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* Epoch Time limits: the lentgh of time that surrounds the epoch.
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* Whether or not you want to remove the baseline????????????????????????????????
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* And finally the name of the new epoched set.
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* Epoch recurrence interval: how separated the epochs will be in seconds(default is 1 sec).
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* Epoch Time limits: the length of time associated with the epoch events in ms (default is [0 1000]), but [-1000 0] is also very common in order to collect the first second of data.
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* Selection for keeping boundary events in the epochs where the occur: ??????????????????????(Default is Yes)
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* Whether or not you want to remove the baseline???????????????????????????????? (Default is NaN)
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* And finally the name of the epoch events that are temporarily being added.
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![epochpopup](/uploads/b86a86e67fec12e863106e825d7fc59a/epochpopup.png)
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After clicking `| Ok |` EEGLAB will prompt you to make a save of the new dataset.
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... | ... | @@ -19,7 +20,7 @@ There are many new plotting options available once the data is epoched. |
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# Concatenating Data
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Similarly to epoching it is important to use the following procedure to concatenate the data rather then the native EEGLAB method. This method does the exact same thing as EEGLAB except it recognises the marks structure and will keep it intact. To recombined the epoched data back into continuous form go to:
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Similarly to epoching it is important to use the following procedure to concatenate the data rather then the native EEGLAB method. This method does the exact same thing as EEGLAB except it recognises the new marks structure and will keep it intact. To recombined the epoched data back into continuous form go to:
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* *Tools-> Marks -> epoching/concatenate data -> Concatenate Epoches into Continuous Data*
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![concatrsmall](/uploads/00c09f3b19ddf8731e6ee2a6839b147c/concatrsmall.png)
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... | ... | |