Cannot open structs with variabel viewer

Hi since a few days I cannot open all of my structs in the variable monitor. If I double click them on the WS the monitor shows up and I get this:

val = 

Columns 1 through 7

    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]

Columns 8 through 14

    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]    [1x1 struct]

(it looks exactly like in the Command Window). [edit] the struct is not named val [/edit]

This happens to not all of my structs. Some of them work properly (the way I can click on the 1x1 structs to see the actual data in there).

Does anyone know what to do? To me this is a really big problem, because I need to know the names of the variables inside the struct.

I'm running MLR2025a and Ubuntu 14.04

[Edit2] As I said before the name of the struct is not val. My struct (msgs_odom) contains 25000 sub-structs in these sub-structs there are variables like position, orientation and a time stamp. But I cannot display them with the variable viewer. I cannot click on:

[1x1 struct]

inside the Variable Viewer. [/Edit2]

[Jan]

Which struct is not named "val"? The posted text shows, that you display a variable called "val". Do you see the "val ="?

Answer 1

[per isakson]

The variable val is a cell array. Each cell contains a struct.

See the question How do I iterate through multiple structures?

Compare

>> s.a=1;
>> cac = { s, s, s }
cac = 
    [1x1 struct]    [1x1 struct]    [1x1 struct]

[Hamsterfiedel]

There is no variable called val in my WS.

[Steven Lord]

Is there a struct array with a field named val, and it is that outer struct you're opening in the Variable Editor?

x = struct;
x.val = {ones(5), rand(6), magic(7)};
x

Or perhaps it's an object? Show us the output of WHOS in the workspace where this behavior occurs and we can figure that out.

[per isakson]

"variable monitor" and "it looks exactly like in the Command Window" confuses me because I don't know what you mean by "variable monitor" and I'm not aware of anything in the Matlab IDE (Matlab Desktop) that displays text like the Command Window does.

"contains 25000 sub-structs" &nbsp could it be that you hit an upper limit of the size of structs, which the Variable Editor can handle?

[Hamsterfiedel]

I've tested it with smaller structs. It appears that the the Variable Editor could handle all structs with less than 1000 sub-structs.

output of whos:

>> whos
Name                               Size                   Bytes  Class              Attributes

abs_wert_sh                        1x44192               353536  double                       
accessor                           1x1                       32  function_handle              
accessor2                          1x1                       32  function_handle              
accessor3                          1x1                       32  function_handle              
ans                                1x659                   1318  char                         
b_pic_ex                           1x1                        8  double                       
bag                                1x1                      372  ros.Bag                      
bag_file                           1x66                     132  char                         
bag_file_name                      1x23                      46  char                         
c_mag                              1x1                        8  double                       
c_odom                             1x1                        8  double                       
c_prtlc                            1x1                        8  double                       
fi_ord                             1x1                        8  double                       
home                               1x32                      64  char                         
i                                  1x1                        8  double                       
ia                             44192x1                   353536  double                       
interp_step_s                      1x1                        8  double                       
j                                  1x1                        8  double                       
kernel                           150x1                     1200  double                       
l_interp                           1x1                        8  double                       
mag_xyz                            3x46430              1114320  double                       
mag_xyz_fir                        3x23120               554880  double                       
mag_xyz_med                        3x23120               554880  double                       
mag_xyz_raw                        3x23120               554880  double                       
mag_xyz_sh                         3x44192              1060608  double                       
map_pgm                          512x576                 294912  uint8                        
map_pgm_name                       1x27                      54  char                         
map_yaml_name                      1x28                      56  char                         
map_yaml_struct                    1x1                     1494  struct                       
max_abs                            1x1                        8  double                       
max_mag                            1x1                        8  double                       
max_x                              1x1                        8  double                       
max_xy                             1x1                        8  double                       
max_y                              1x1                        8  double                       
meta_mag                           1x23120             28715040  cell                         
meta_odom                          1x24597             30205116  cell                         
meta_prtlc                         1x971                1221518  cell                         
min_mag                            1x1                        8  double                       
min_x                              1x1                        8  double                       
min_xy                             1x1                        8  double                       
min_y                              1x1                        8  double                       
msgs_mag                           1x23120             42494560  cell                         
msgs_odom                          1x24597             98781552  cell                         
msgs_prtlc                         1x971              137837334  cell                         
n                                  1x1                        8  double                       
odom_angl                          1x1                   590856  struct                       
odom_ori_raw                       4x24597               787104  double                       
odom_xy                            2x46430               742880  double                       
odom_xy_sh                         2x44192               707072  double                       
odom_xy_sh_v                   44192x2                   707072  double                       
odom_xy_v                      46430x2                   742880  double                       
odom_xyz                           3x46430              1114320  double                       
odom_xyz_raw                       3x24597               590328  double                       
ori_buffer                         4x1                       32  double                       
ori_prtcl_raw                      4x971                  31072  double                       
pos_buffer                         3x1                       24  double                       
pos_prtcl                          3x46430              1114320  double                       
pos_prtcl_raw                      3x971                  23304  double                       
prog                               1x26                      52  char                         
prtcl_angl                         1x1                    23832  struct                       
raw                                1x1                        1  logical                      
raw_twist_definition_mag           1x1149                  2298  char                         
raw_twist_definition_odom          1x384                    768  char                         
step_s                             1x1                        8  double                       
t_end                              1x1                        8  double                       
t_start                            1x1                        8  double                       
times_interp                       1x46430               371440  double                       
times_interp_sh                    1x44192               353536  double                       
times_mag                          1x23120               184960  double                       
times_mag_zero                     1x23120               184960  double                       
times_odom                         1x24597               196776  double                       
times_odom_zero                    1x24597               196776  double                       
times_prtlc                        1x971                   7768  double                       
times_prtlc_zero                   1x971                   7768  double                       
topic1                             1x4                        8  char                         
topic2                             1x5                       10  char                         
topic3                             1x14                      28  char                         
twist_definition_mag               1x177                    354  char                         
twist_definition_odom              1x620                   1240  char                         
twist_definition_prtcl             1x262                    524  char                         
x_map                           1572x1572              19769472  double                       
y_map                           1572x1572              19769472  double                       
yaw_odom_twist                     1x24597               196776  double

I added a picture of what I see when I double click on such a struct in the Workspace

[per isakson]

Now, I understand, but I cannot help. Comments:

• whos shows that msgs_mag is a [1,23120] cell array. Why don't you use a struct array instead? However, that is beside the point.
• each "sub-struct" isn't big, &nbsp 42494560/23120, ans = 1838.

I made a small experiment on R2013a, 64bit, Win7:

>> s
s = 
    a: 1
    b: 2
    c: 3
    d: 4
    s: [1x1 struct]
>> c = repmat( {s}, [1,231200] );
>> whos c s
  Name      Size                    Bytes  Class     Attributes
  c         1x231200            617766400  cell                
  s         1x1                      2560  struct

and displayed c in the Variable Editor

&nbsp

It's a bit sluggish (on my eight years old vanilla PC) but it works as expected.

Why not send your problem to tech support? If you have a student license they might not help you, but I think they should be interested.