Calculating survival probabilities from Mortality tables in MATLAB

I am working with mortality tables on MATLAB. My aim is to upload any (Mortality Table) data file in Matlab and calculate survival probabilities.

I tried to calibrate lifetable using MATLAB program [a,elx] = lifetablefit(x,lx). But I am not able to run the code. Matlab returns,

Unrecognized function or variable 'x'.
Error in lifetable (line 6) [a,elx] = lifetablefit(x,lx);

I have attached the datafile and I here is my code.

opts=detectImportOptions('lifetable2000CM.csv', 'PreserveVariableNames', true) % to locate table and return its import options
data = readtable('lifetable2000CM.csv',opts); % I have two variables "x" which is age and "lx" which is number of survivals at each age
[a,elx] = lifetablefit(x,lx); 

MATLAB works perfectly fine if I write

load us_lifetable_2009

My aim is to to program any kind of lifetable in MATLAB. If anyone has experience in this area please help me out.

Answer 1

[Tommy]

readtable() returns a table which should contain your variables. Try

[a,elx] = lifetablefit(data.x, data.lx);

[susman]

that works perfectly thanks :)