c,rfDC format to FIF format

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1

Dear MNE’s,
I am using mne python to draw the topology map of MEG data, but I have encountered a problem. The drawing function requires the data to be in FIF format, but the data I use is in c,rfDC format. I am wondering if there is any way to convert the format used to FIF format?
Thank you!

2

Hello @chuna2002 and welcome to the forum!

You can simply read the data with MNE. No need to convert to FIF first:

https://mne.tools/stable/auto_tutorials/io/10_reading_meg_data.html#d-neuroimaging-bti-data-dir

Best wishes,
Richard

4

Thanks for your reply!
I know there is a way to read the data in c,rfDC format,but this format cannot use the plot_topomap() and plot_asrrowmap() function which use the data in FIF format , so I would like to know if there’s a way to switch between these two forms.
ChuNa

5

Once data has been read by MNE, all functions should work with it. Please share your code and pinpoint exactly what is not working so we can get a better understanding of your problem. Please also share the output of

import mne
mne.sys_info()

Thanks!

6 
import mne
pdf_fname = ('D:/A/104012/6-Wrkmem/4D/c,rfDC')
config_fname = ('D:/A/104012/6-Wrkmem/4D/config')
head_shape_fname = ('D:/A/104012/6-Wrkmem/4D/e,rfhp1.0Hz,COH')
sphere = mne.make_sphere_model(r0=(0., 0., 0.), head_radius=0.080)
t0 = 0.07  # peak of the response
raw = mne.io.read_raw_bti(pdf_fname, config_fname, head_shape_fname, convert=False, rename_channels=False, preload=True)
pos=raw.info
for i in range(287):
    if pos['ch_names'][i].startswith('A') is False:
        print(pos['ch_names'][i])
        raw.info['bads'].append(pos['ch_names'][i])
print(raw.info['bads'])
condition = 'TRIGGER'
evoked = mne.read_evokeds(pdf_fname, condition=condition, baseline=None)
times = np.arange(0.05, 0.151, 0.02)
evoked.plot_topomap(times, ch_type='mag')

image
image1069×59 6.63 KB

7

You cannot read the raw data as evoked …

1 Like
8

Thanks！I have solved my problem. :smiley:

9

Great! What did you do?