it is a problem of data types ?

i heave this error whit the code, i don´t know why, i suposed is a problem whit the datatype but i don´t know why this is the error: In an assignment A(I) = B, the number of elements in B and I must be the same. Error in ADC_serialPort_K64F_V6 (line 30) v(ctr) = (value_mf); oohh, i use a serial cmunication, 8 bits, when the voltaje is higher than 0 volts, it works, example if a conected 3 volts in the microcontroller adc, it works, but when the voltaje is under the 0 volts or close (i suposed close) it doesn´t work, thank you. this is the code:

    while ctr <= i                                                                                                                 

    value_mf = fscanf(Datos,'%d',1) ;                           
    v(ctr) = (value_mf);                                             
    v(ctr) = (v(ctr)*3.3/256);

         if v(ctr)>3.3
            v(ctr) = v(ctr - 1);        
         end

      ctr=ctr+1;  
end

Answer 1

[Roger Stafford]

The problem here is that 'ctr' of v(ctr) is not the same size as whatever the output of 'fscanf' is at that point, so matlab doesn't know how to proceed with the assignment. I am guessing 'ctr' is a scalar quantity and 'fscanf' is outputting something with multiple elements. If so, how is matlab to stuff many elements into a single element?

[Ricardo De Santiago]

oohh, in effect, then i can use another variable, or convert the output of fscanf? well, it´s helpful reply, thank you