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Error using fprintf Unable to convert 'sym' value to 'double'.

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fprintf(nru,'{ %.3f uta1 + %.2f uta2 = -%.2f\n',[UI1,SG13,SG12]);
fprintf(nru,'{ %.3f uta1 + %.2f uta2 = -%.2f\n\n',[SG13,UI2,SG23]);
fprintf(nru,'uta 1 = %.4g\n\n',xSoa);
fprintf(nru,'uta 2 = %.4g\n\n',ySob);
fprintf(nru,'V3 = 1/(pierwiastek(1 + %.4s^2 + %.4s^2)) = %.4s\n\n',[xSoa,ySob,V31]);
fprintf(nru,'V1 = %.4g * %.4g = %.4g\n\n',[xSoa,V31,V11]);
fprintf(nru,'V2 = %.4g* %.4g = %.4g\n\n',[ySob,V31,V21]);
fprintf(nru,'VL1= [ %.4g ; %.4g ; %.4g ]',VL1);
When i use '%s'
In my txt, i dont have any numbers.
"Error using fprintf
Unable to convert 'sym' value to 'double'.
Error in WXY4 (line 281)
fprintf(nru,'uta 1 = %.4g\n\n',xSoa);"
Please help.

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Accepted Answer

Walter Roberson
Walter Roberson on 18 Jan 2020
fprintf(nru,'{ %.3f uta1 + %.2f uta2 = -%.2f\n',[UI1,SG13,SG12]);
fprintf(nru,'{ %.3f uta1 + %.2f uta2 = -%.2f\n\n',[SG13,UI2,SG23]);
fprintf(nru,'uta 1 = %s\n\n', char(xSoa));
fprintf(nru,'uta 2 = %s\n\n', char(ySob));
fprintf(nru,'V3 = 1/(pierwiastek(1 + %s^2 + %s^2)) = %s\n\n', char(xSoa), char(ySob), char(V31));
fprintf(nru,'V1 = %s * %s = %s\n\n', char(xSoa), char(V31), char(V11));
fprintf(nru,'V2 = %s * %s = %s\n\n', char(ySob), char(V31), char(V21));
fprintf(nru,'VL1= [ %.4g ; %.4g ; %.4g ]',VL1);

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