Hi,
Variables ‘w-vel_1’, ‘v-vel_1’, ‘u-vel_1’, ‘w-vel_1.25’ are not valid variable names as these include ‘-’,’.’ characters. So change your header variable names.
% reading csv file to a table without header
m=readtable('questionmatlabs.csv','ReadVariableNames',0);
t=m(2,:); %extracting the data of the second row
c=table2cell(t); %converting table to cellarray
c={'Time','w_vel_1','v_vel_1','uvel_1','w_vel_25'};
m.Properties.VariableNames=c; % setting the second row as header
m([1,2],:)=[]; % deleting first 2 rows of table
