C3D Help

Question

federico valenti 2011-3-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/3652-c3d-help

采纳的回答： Jan

I had a C3D file and I need the sample rate from that

this is the code that i used:

server=c3dserver % create a c3d server

openc3d(server) % open a c3d file

XYZPOS=get3dtargets(server) % get the targets and store'em in a struct

VT1=[XYZPOS().T1] % store the displacements in a vector from every channel

VT2=[XYZPOS().T2];

VT3=[XYZPOS().T3];

VT4=[XYZPOS().T4];

VF4=[XYZPOS().F4];

VF3=[XYZPOS().F3];

VF2=[XYZPOS().F2];

VF1=[XYZPOS().F1];

VM1=[XYZPOS().M1];

VM2=[XYZPOS().M2];

VM3=[XYZPOS().M3];

VM4=[XYZPOS().M4];

VACC_1=[XYZPOS().ACC_1];

VACC_2=[XYZPOS().ACC_2];

VACC_T=[XYZPOS().ACC_T];

VACC_2=[XYZPOS().ACC_2];

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Answer 1

Jan 2011-3-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/3652-c3d-help#answer_5286

在 MATLAB Online 中打开

Do you want the sample rate only?

FID = fopen(C3DFileName, 'r');
fssek(FID, 20, 'bof');
Rate = fread(FID, 1, 'float32');
fclsoe(FID);

If you want to use c3dserver, what does the documentation state for getting the frame rate?!

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federico valenti 2011-3-22

read below ;-)

TY

federico valenti 2011-4-11

thanks you were very kind

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Answer 2

federico valenti 2011-3-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/3652-c3d-help#answer_5365

i'll explain you the entire question:

i don't know c3d and matlab at all. My teacher gave me a c3d file and i have to create an ascii file with 4 columns T X Y Z (T is a simple time's vector from the trial). For X, Y and Z I stored them in vectors (how you can read above) now I need the vector T

about the code you wrote i typed

>> FID = fopen(C:\Documents and Settings\federico\Documenti\MATLAB\C3D\SINT3-07.c3d, 'r');

and the matlab anwers was

??? FID = fopen(C:\Documents and Settings\federico\Documenti\MATLAB\C3D\SINT3-07.c3d, 'r'); | Error: Unexpected MATLAB operator.