call Matlab's memmapfile with subsasgn
I have a large writable Matlab's memmapfile object that I want to access and modify.
Access
If I try:
mmap.Data.bit(1)
or
subsref(mmap.Data.bit, substruct('()', 1))
I get the same value (0).
Modify
If I try:
mmap.Data.bit(1) = 1
I can assign this value very quickly, but if I try:
[~] = subsasgn(mmap.Data, substruct('.', 'bit', '()', 1))
Matlab stops responding and never ends the line.
What is the problem with subsasgn and mmap?
matlab memory-mapped-files
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
add a comment |
I have a large writable Matlab's memmapfile object that I want to access and modify.
Access
If I try:
mmap.Data.bit(1)
or
subsref(mmap.Data.bit, substruct('()', 1))
I get the same value (0).
Modify
If I try:
mmap.Data.bit(1) = 1
I can assign this value very quickly, but if I try:
[~] = subsasgn(mmap.Data, substruct('.', 'bit', '()', 1))
Matlab stops responding and never ends the line.
What is the problem with subsasgn and mmap?
matlab memory-mapped-files
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
add a comment |
I have a large writable Matlab's memmapfile object that I want to access and modify.
Access
If I try:
mmap.Data.bit(1)
or
subsref(mmap.Data.bit, substruct('()', 1))
I get the same value (0).
Modify
If I try:
mmap.Data.bit(1) = 1
I can assign this value very quickly, but if I try:
[~] = subsasgn(mmap.Data, substruct('.', 'bit', '()', 1))
Matlab stops responding and never ends the line.
What is the problem with subsasgn and mmap?
matlab memory-mapped-files
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
I have a large writable Matlab's memmapfile object that I want to access and modify.
Access
If I try:
mmap.Data.bit(1)
or
subsref(mmap.Data.bit, substruct('()', 1))
I get the same value (0).
Modify
If I try:
mmap.Data.bit(1) = 1
I can assign this value very quickly, but if I try:
[~] = subsasgn(mmap.Data, substruct('.', 'bit', '()', 1))
Matlab stops responding and never ends the line.
What is the problem with subsasgn and mmap?
matlab memory-mapped-files
matlab memory-mapped-files
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
asked Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
308115
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
What Matlab was actually trying to do is to load the whole content of the file.
The correct line is:
[~] = subsasgn(mmap, substruct('.', 'Data', '.', 'bit', '()', 1))
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
What Matlab was actually trying to do is to load the whole content of the file.
The correct line is:
[~] = subsasgn(mmap, substruct('.', 'Data', '.', 'bit', '()', 1))
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
add a comment |
What Matlab was actually trying to do is to load the whole content of the file.
The correct line is:
[~] = subsasgn(mmap, substruct('.', 'Data', '.', 'bit', '()', 1))
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
add a comment |
What Matlab was actually trying to do is to load the whole content of the file.
The correct line is:
[~] = subsasgn(mmap, substruct('.', 'Data', '.', 'bit', '()', 1))
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
What Matlab was actually trying to do is to load the whole content of the file.
The correct line is:
[~] = subsasgn(mmap, substruct('.', 'Data', '.', 'bit', '()', 1))
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
answered Nov 15 '18 at 16:29
Hugo TrentesauxHugo Trentesaux
308115
308115
add a comment |
add a comment |
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