Error using sscanf Invalid format.
显示 更早的评论
this is my code and i am gettin the above mentioned error help would be apreciated
% Button pushed function: SelectFileButton
function SelectFileButtonPushed(app, event)
[F,P] = uigetfile();
Results1 = fullfile(P,F);
Results2 = fopen(Results1);
Results4 = [0,0,0];
FlowRatePulse = [];
Pressure = [];
n = 0;
Time = 0;
while n >= 0
n = n+1;
Results3 = fgetl(Results2);
Results5 = sscanf(Results3,Results4);
Pressure(n) =((-0.2+Results5(1,1))/0.0018)/5;
FlowRatePulse(n) = Results5(1,2)/330;
Time = Time + Results5(1,3);
end
plot(app.UIAxes,Pressure,FlowRatePulse,'o')
plot(app.UIAxes2,Time,Pressure,'o')
plot(app.UIAxes3,Time,FlowRatePulse,'o')
end
2 个评论
Stephen23
2020-6-5
I note that you have already fixed your previous unrelated error using the answer that I gave you, but have not accepted the answer. On this forum it is considered polite to accept an answer when it resolves your original question.
Jordan Stocker
2020-6-5
采纳的回答
The sscanf documentation explains its syntax as "A = sscanf(str,formatSpec) reads data from str, converts it according to the format specified by formatSpec..." and also specifies that " formatSpec can be a character vector in single quotes, or a string scalar."
Rather than following what the documentation requires, you have defined the format specifier as the numeric vector [0,0,0]. Instead of a numeric vector, you should be providing a character vector or a string scalar, as the documentation states. The documentation also has plenty of examples of the format specifier.
2 个评论
Jordan Stocker
2020-6-5
One way would be to download my FEX submission sip2num and use that on the complete file string, e,g.:
>> str = fileread('Gradual opening of tap.txt');
>> mat = sip2num(str); % converts '500 m' to 0.5
>> mat = reshape(mat,3,[]).'
mat =
0.36168 0 0.5
0.35679 0 0.5
0.36168 0 0.5
0.36168 0 0.5
0.36657 0 0.5
0.36168 0 0.5
0.36168 0 0.5
0.36168 0 0.5
0.36168 0 0.5
0.36168 0 0.5
0.35679 0 0.5
0.35679 0 0.5
0.36168 0 0.5
0.35679 0 0.5
0.36168 0 0.5
0.35679 0 0.5
0.35679 0 0.5
0.34702 1 0.5
0.35191 3 0.5
0.35679 4 0.5
0.36168 3 0.5
0.35191 4 0.5
0.35191 4 0.5
0.35191 4 0.5
... lots more lines here
0.29814 35 0.5
0.30303 35 0.5
0.29326 35 0.5
0.30303 35 0.5
0.29814 34 0.5
0.29814 35 0.5
0.30303 35 0.5
0.30303 35 0.5
>>
If you really want to use fscanf or sscanf then you will need to define a suitable format string, e.g.:
>> mat = sscanf(str,'%f V,%f counts,%f ms',[3,Inf]).'
mat =
0.36168 0 500
0.35679 0 500
0.36168 0 500
0.36168 0 500
0.36657 0 500
0.36168 0 500
0.36168 0 500
0.36168 0 500
0.36168 0 500
0.36168 0 500
0.35679 0 500
0.35679 0 500
0.36168 0 500
0.35679 0 500
0.36168 0 500
0.35679 0 500
0.35679 0 500
0.34702 1 500
0.35191 3 500
0.35679 4 500
0.36168 3 500
0.35191 4 500
0.35191 4 500
... lots more lines here
0.30303 35 500
0.29326 35 500
0.30303 35 500
0.29814 34 500
0.29814 35 500
0.30303 35 500
0.30303 35 500
>>
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 App Building 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
